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                    <OTText id="44973f6d-a45d-11de-ab20-c126e5d7ed4e" text="If you checked &quot;Other&quot; in the previous question, please type the name of the courses in which you previously have done SAM or RI-ITEST activities, otherwise skip this question." />
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                    <OTText id="44973f6e-a45d-11de-ab20-c126e5d7ed4e" text="" />
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                <OTQuestion id="44976680-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page1.cml">
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                    <OTText id="44976681-a45d-11de-ab20-c126e5d7ed4e" text="1. What are computer models used for?" />
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                    <OTChoice id="44976682-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
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                        <OTText id="44978d93-a45d-11de-ab20-c126e5d7ed4e" text="making predictions" />
                        <OTText id="44978d94-a45d-11de-ab20-c126e5d7ed4e" text="testing theories" />
                        <OTText id="44978d95-a45d-11de-ab20-c126e5d7ed4e" text="designing things" />
                        <OTText id="4497dbb6-a45d-11de-ab20-c126e5d7ed4e" text="making predictions AND testing theories" />
                        <OTText id="4497dbb7-a45d-11de-ab20-c126e5d7ed4e" text="all of the above" />
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                <OTQuestion id="449829d8-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page1.cml">
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                    <OTText id="449829d9-a45d-11de-ab20-c126e5d7ed4e" text="2. What is true of the best computer models?" />
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                    <OTChoice id="449829da-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
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                        <OTText id="449850eb-a45d-11de-ab20-c126e5d7ed4e" text="They are a completely accurate reproduction of what they are modeling." />
                        <OTText id="449850ec-a45d-11de-ab20-c126e5d7ed4e" text="They are a completely accurate reproduction of what they are modeling except they are scaled differently (smaller or bigger than the real thing)." />
                        <OTText id="449850ed-a45d-11de-ab20-c126e5d7ed4e" text="They may not be a completely accurate reproduction of what they are modeling, but they produce reasonably good results that come close to matching reality." />
                        <OTText id="449850ee-a45d-11de-ab20-c126e5d7ed4e" text="They may not be a completely accurate reproduction of what they are modeling, but they look exactly like what they are modeling." />
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                    <object refid="449850ed-a45d-11de-ab20-c126e5d7ed4e" />
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                <OTQuestion id="449877ff-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page1.cml">
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                    <OTText id="44987800-a45d-11de-ab20-c126e5d7ed4e" text="3. In which case would it NOT make sense to use a computer model?" />
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                    <OTChoice id="44987801-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
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                        <OTText id="44987802-a45d-11de-ab20-c126e5d7ed4e" text="to conduct experiments that would be too expensive to do in real life" />
                        <OTText id="44989f13-a45d-11de-ab20-c126e5d7ed4e" text="to conduct experiments that would be too dangerous to do in real life" />
                        <OTText id="44989f14-a45d-11de-ab20-c126e5d7ed4e" text="to conduct experiments that would take too long to do in real life" />
                        <OTText id="44989f15-a45d-11de-ab20-c126e5d7ed4e" text="to verify real-life experiments for which we already know the results" />
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                <OTQuestion id="4498c626-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page1.cml">
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                    <OTText id="4498c627-a45d-11de-ab20-c126e5d7ed4e" text="4. What is the most likely reason the results from a model may NOT perfectly match reality?" />
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                    <OTChoice id="4498c628-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
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                        <OTText id="4498c629-a45d-11de-ab20-c126e5d7ed4e" text="All the factors that might affect the model were not considered." />
                        <OTText id="4498ed3a-a45d-11de-ab20-c126e5d7ed4e" text="The user set the controls or initial parameters so that the starting conditions for the model were unrealistic." />
                        <OTText id="4498ed3b-a45d-11de-ab20-c126e5d7ed4e" text="The user didn't interpret the results properly." />
                        <OTText id="4499144c-a45d-11de-ab20-c126e5d7ed4e" text="There was a problem with the computer processor." />
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                    <object refid="4498c629-a45d-11de-ab20-c126e5d7ed4e" />
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                <OTQuestion id="44993b5d-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page1.cml">
                  <prompt>
                    <OTText id="44993b5e-a45d-11de-ab20-c126e5d7ed4e" text="5. A liquid CANNOT be squeezed into a significantly smaller volume. This is because molecules in a liquid" />
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                    <OTChoice id="44993b5f-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
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                        <OTText id="44993b60-a45d-11de-ab20-c126e5d7ed4e" text="move too fast to be compressed into a smaller volume" />
                        <OTText id="44993b61-a45d-11de-ab20-c126e5d7ed4e" text="are bigger than gas molecules" />
                        <OTText id="44996172-a45d-11de-ab20-c126e5d7ed4e" text="have very little space between them" />
                        <OTText id="44996173-a45d-11de-ab20-c126e5d7ed4e" text="flow freely through their container" />
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                    <object refid="44996172-a45d-11de-ab20-c126e5d7ed4e" />
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                <OTQuestion id="44998884-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page1.cml">
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                    <OTText id="44998885-a45d-11de-ab20-c126e5d7ed4e" text="6. What happens as water boils?" />
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                    <OTChoice id="44998886-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
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                        <OTText id="44998887-a45d-11de-ab20-c126e5d7ed4e" text="The water molecules overcome their attractions for each other." />
                        <OTText id="44998888-a45d-11de-ab20-c126e5d7ed4e" text="The covalent bonds between the hydrogen and oxygen atoms that make up the water molecules are broken." />
                        <OTText id="4499d6a9-a45d-11de-ab20-c126e5d7ed4e" text="The attractions between the water molecules are weakened." />
                        <OTText id="4499d6aa-a45d-11de-ab20-c126e5d7ed4e" text="The hydrogen and oxygen atoms that make up the water molecules are destroyed." />
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                    <object refid="44998887-a45d-11de-ab20-c126e5d7ed4e" />
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                <OTQuestion id="4cc13dab-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page2.cml">
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                    <OTText id="4cc13dac-a45d-11de-ab20-c126e5d7ed4e" text="7. Heating a solid eventually causes melting. This is because heating a solid" />
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                    <OTChoice id="4cc13dad-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
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                        <OTText id="4cc164be-a45d-11de-ab20-c126e5d7ed4e" text="gives the atoms more kinetic energy, so they can overcome some of their attractions" />
                        <OTText id="4cc164bf-a45d-11de-ab20-c126e5d7ed4e" text="loosens the material between the atoms, allowing them to move past each other" />
                        <OTText id="4cc164c0-a45d-11de-ab20-c126e5d7ed4e" text="creates a chemical reaction that turns the solid into a liquid" />
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                    <object refid="4cc164be-a45d-11de-ab20-c126e5d7ed4e" />
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                <OTQuestion id="4cc18bd1-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page2.cml">
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                    <OTText id="4cc18bd2-a45d-11de-ab20-c126e5d7ed4e" text="8. When nitrogen gas is cooled to a low enough temperature, it becomes a liquid. Why?" />
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                    <OTChoice id="4cc18bd3-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
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                        <OTText id="4cc18bd4-a45d-11de-ab20-c126e5d7ed4e" text="The energy of the nitrogen gas decreases, and the nitrogen molecules stop moving." />
                        <OTText id="4cc18bd5-a45d-11de-ab20-c126e5d7ed4e" text="The cold energy of the nitrogen gas increases, and the nitrogen molecules bind together." />
                        <OTText id="4cc18bd6-a45d-11de-ab20-c126e5d7ed4e" text="A chemical reaction happens, and the nitrogen gas changes into water." />
                        <OTText id="4cc1b2e7-a45d-11de-ab20-c126e5d7ed4e" text="The nitrogen molecules move more slowly and don't have enough energy to overcome their attractive forces." />
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                    <object refid="4cc1b2e7-a45d-11de-ab20-c126e5d7ed4e" />
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                <OTQuestion id="4cc1b2e8-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page2.cml">
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                    <OTText id="4cc1b2e9-a45d-11de-ab20-c126e5d7ed4e" text="9. One substance can have a higher boiling point than another substance. This is because the molecules of a substance with a higher boiling point" />
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                    <OTChoice id="4cc1b2ea-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
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                        <OTText id="4cc1d9fb-a45d-11de-ab20-c126e5d7ed4e" text="have weaker attractions to each other" />
                        <OTText id="4cc1d9fc-a45d-11de-ab20-c126e5d7ed4e" text="have stronger attractions to each other" />
                        <OTText id="4cc1d9fd-a45d-11de-ab20-c126e5d7ed4e" text="are harder to break down into atoms" />
                        <OTText id="4cc1d9fe-a45d-11de-ab20-c126e5d7ed4e" text="do not absorb heat well" />
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                <OTQuestion id="4cc2010f-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page2.cml">
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                    <OTText id="4cc20110-a45d-11de-ab20-c126e5d7ed4e" text="10. When water is boiling, the temperature of the boiling water stays at 100°C, even though heat energy is continually transferred to the water. Why does the temperature stay the same?" />
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                    <OTChoice id="4cc20111-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
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                        <OTText id="4cc20112-a45d-11de-ab20-c126e5d7ed4e" text="Water cannot get any hotter than 100°C. That is its maximum temperature." />
                        <OTText id="4cc22823-a45d-11de-ab20-c126e5d7ed4e" text="The heat energy is being used to break up the water molecules into hydrogen and oxygen molecules." />
                        <OTText id="4cc22824-a45d-11de-ab20-c126e5d7ed4e" text="The heat energy is being used to overcome the attractions between molecules." />
                        <OTText id="4cc22825-a45d-11de-ab20-c126e5d7ed4e" text="The heat energy is being used to destroy some of the hydrogen and oxygen atoms that make up the water molecules." />
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                <OTQuestion id="4cc2c466-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page2.cml">
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                    <OTText id="4cc31287-a45d-11de-ab20-c126e5d7ed4e" text="11. As water evaporates from your skin, it feels cooler there. This is because during evaporation" />
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                    <OTChoice id="4cc31288-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="4cc31289-a45d-11de-ab20-c126e5d7ed4e" text="the molecules with the highest energy evaporate first, lowering the temperature of the remaining water" />
                        <OTText id="4cc3128a-a45d-11de-ab20-c126e5d7ed4e" text="water molecules condense in the air around the water, cooling the nearby skin molecules" />
                        <OTText id="4cc3399b-a45d-11de-ab20-c126e5d7ed4e" text="cold energy is transmitted through collisions from the water molecules to the skin molecules" />
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                    <object refid="4cc31289-a45d-11de-ab20-c126e5d7ed4e" />
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                <OTQuestion id="4cc3399c-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page2.cml">
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                    <OTText id="4cc3399d-a45d-11de-ab20-c126e5d7ed4e" text="12. The pressure a gas exerts on the surface of an object is affected by which of the following factors?" />
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                    <OTChoice id="4cc3399e-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
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                        <OTText id="4cc360af-a45d-11de-ab20-c126e5d7ed4e" text="the mass of the individual molecules that are colliding against the object" />
                        <OTText id="4cc360b0-a45d-11de-ab20-c126e5d7ed4e" text="the frequency of the molecular collisions against the object" />
                        <OTText id="4cc360b1-a45d-11de-ab20-c126e5d7ed4e" text="the force with which each molecule collides against the object" />
                        <OTText id="4cc360b2-a45d-11de-ab20-c126e5d7ed4e" text="both A and B" />
                        <OTText id="4cc360b3-a45d-11de-ab20-c126e5d7ed4e" text="both B and C" />
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                <OTQuestion id="4cc42404-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page2.cml">
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                    <OTText id="4cc42405-a45d-11de-ab20-c126e5d7ed4e" text="13. A balloon filled with a gas will expand when heated. Why does this happen?" />
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                    <OTChoice id="4cc44b16-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
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                        <OTText id="4cc44b17-a45d-11de-ab20-c126e5d7ed4e" text="The number of atoms inside the balloon increases, so the atoms take up more space." />
                        <OTText id="4cc44b18-a45d-11de-ab20-c126e5d7ed4e" text="The atoms collide more forcefully, increasing the space between them." />
                        <OTText id="4cc44b19-a45d-11de-ab20-c126e5d7ed4e" text="The material between atoms expands, increasing the size of the balloon." />
                        <OTText id="4cc44b1a-a45d-11de-ab20-c126e5d7ed4e" text="The forces between atoms weaken, allowing the atoms to separate from each other." />
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                    </OTChoice>
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                  <correctAnswer>
                    <object refid="4cc44b18-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="4cc4722b-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page2.cml">
                  <prompt>
                    <OTText id="4cc4722c-a45d-11de-ab20-c126e5d7ed4e" text="14. A container is filled with a gas. How can the gas pressure be increased if the volume of the container remains the same?" />
                  </prompt>
                  <input>
                    <OTChoice id="4cc4722d-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="4cc4722e-a45d-11de-ab20-c126e5d7ed4e" text="by either increasing the number of molecules or increasing the temperature" />
                        <OTText id="4cc4993f-a45d-11de-ab20-c126e5d7ed4e" text="by either increasing the number of molecules or decreasing the temperature" />
                        <OTText id="4cc49940-a45d-11de-ab20-c126e5d7ed4e" text="by either decreasing the number of molecules or increasing the temperature" />
                        <OTText id="4cc49941-a45d-11de-ab20-c126e5d7ed4e" text="by either decreasing the number of molecules or decreasing the temperature" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="4cc4722e-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="4eff1ff2-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page3.cml">
                  <prompt>
                    <OTText id="4eff1ff3-a45d-11de-ab20-c126e5d7ed4e" text="15. If the volume of a gas increases while its temperature and number of molecules remain constant, what happens to the pressure?" />
                  </prompt>
                  <input>
                    <OTChoice id="4eff1ff4-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="4eff1ff5-a45d-11de-ab20-c126e5d7ed4e" text="The pressure increases." />
                        <OTText id="4eff1ff6-a45d-11de-ab20-c126e5d7ed4e" text="The pressure decreases." />
                        <OTText id="4eff1ff7-a45d-11de-ab20-c126e5d7ed4e" text="The pressure stays the same." />
                        <OTText id="4eff1ff8-a45d-11de-ab20-c126e5d7ed4e" text="It depends on the type of gas." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="4eff1ff6-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="4eff4709-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page3.cml">
                  <prompt>
                    <OTText id="4eff470a-a45d-11de-ab20-c126e5d7ed4e" text="16. A balloon is inside a very warm house. A student brings the balloon outside into the cold winter air. What should happen to the size of the balloon?" />
                  </prompt>
                  <input>
                    <OTChoice id="4eff470b-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="4eff470c-a45d-11de-ab20-c126e5d7ed4e" text="The balloon will get larger." />
                        <OTText id="4eff470d-a45d-11de-ab20-c126e5d7ed4e" text="The balloon will get smaller." />
                        <OTText id="4eff470e-a45d-11de-ab20-c126e5d7ed4e" text="The balloon will stay the same size." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="4eff470d-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="4eff6e1f-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page3.cml">
                  <prompt>
                    <OTText id="4eff6e20-a45d-11de-ab20-c126e5d7ed4e" text="17. As you pump up a basketball, the pressure inside increases because there are more molecular collisions. This is PRIMARILY because pumping up the ball" />
                  </prompt>
                  <input>
                    <OTChoice id="4eff6e21-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="4eff6e22-a45d-11de-ab20-c126e5d7ed4e" text="adds energy, so the molecules move around much more quickly" />
                        <OTText id="4eff9533-a45d-11de-ab20-c126e5d7ed4e" text="adds more air molecules" />
                        <OTText id="4eff9534-a45d-11de-ab20-c126e5d7ed4e" text="increases the friction between the added air molecules and those originally inside the ball" />
                        <OTText id="4eff9535-a45d-11de-ab20-c126e5d7ed4e" text="causes the ball to get significantly larger" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="4eff9533-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="4effbc46-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page3.cml">
                  <prompt>
                    <OTText id="4effbc47-a45d-11de-ab20-c126e5d7ed4e" text="18. If a boy expands his lungs while holding his breath, the air pressure in his lungs will decrease. Why? (Assume the temperature of the air in his lungs remains constant.)" />
                  </prompt>
                  <input>
                    <OTChoice id="4effbc48-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="4effbc49-a45d-11de-ab20-c126e5d7ed4e" text="Expanding his lungs slows down the air molecules, causing fewer collisions between them." />
                        <OTText id="4effbc4a-a45d-11de-ab20-c126e5d7ed4e" text="Expanding his lungs allows more air molecules to be dissolved into the blood, causing fewer collisions between them." />
                        <OTText id="4effbc4b-a45d-11de-ab20-c126e5d7ed4e" text="Expanding his lungs gives the air molecules more space, causing fewer collisions between them." />
                        <OTText id="4effbc4c-a45d-11de-ab20-c126e5d7ed4e" text="Expanding his lungs adds energy to the air molecules, causing more collisions between them." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="4effbc4b-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="4f000a6d-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page3.cml">
                  <prompt>
                    <OTText id="4f000a6e-a45d-11de-ab20-c126e5d7ed4e" text="19. One balloon is twice the volume of another. If both balloons are at the same pressure and temperature, the larger balloon holds" />
                  </prompt>
                  <input>
                    <OTChoice id="4f000a6f-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="4f000a70-a45d-11de-ab20-c126e5d7ed4e" text="the same number of molecules as the smaller one" />
                        <OTText id="4f003181-a45d-11de-ab20-c126e5d7ed4e" text="twice the number of molecules as the smaller one" />
                        <OTText id="4f003182-a45d-11de-ab20-c126e5d7ed4e" text="half the number of molecules as the smaller one" />
                        <OTText id="4f003183-a45d-11de-ab20-c126e5d7ed4e" text="four times the number of molecules as the smaller one" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="4f003181-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="4f005894-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page3.cml">
                  <prompt>
                    <OTText id="4f005895-a45d-11de-ab20-c126e5d7ed4e" text="20. Most spray cans have a warning that says to keep away from extreme heat because of risk of explosion. Why would heating a sealed can cause it to explode?" />
                  </prompt>
                  <input>
                    <OTChoice id="4f005896-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="4f007fa7-a45d-11de-ab20-c126e5d7ed4e" text="Heating expands the metal of the can, which weakens the seals and allows the already high-pressure gas to escape." />
                        <OTText id="4f007fa8-a45d-11de-ab20-c126e5d7ed4e" text="Heating causes a chemical reaction, which creates more gas molecules." />
                        <OTText id="4f007fa9-a45d-11de-ab20-c126e5d7ed4e" text="Heating compresses the gases inside the can, which increases the pressure." />
                        <OTText id="4f007faa-a45d-11de-ab20-c126e5d7ed4e" text="Heating increases the force and frequency of molecules colliding with the container." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="4f007faa-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="4f00a6bb-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page3.cml">
                  <prompt>
                    <OTText id="4f00a6bc-a45d-11de-ab20-c126e5d7ed4e" text="21. A student places one end of a paper towel in a bowl of water. Why does the paper towel soak up some of the water?" />
                  </prompt>
                  <input>
                    <OTChoice id="4f00a6bd-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="4f00a6be-a45d-11de-ab20-c126e5d7ed4e" text="Water molecules chemically react with molecules of the paper towel." />
                        <OTText id="4f00a6bf-a45d-11de-ab20-c126e5d7ed4e" text="Water molecules are attracted to molecules of the paper towel." />
                        <OTText id="4f00a6c0-a45d-11de-ab20-c126e5d7ed4e" text="Water molecules repel each other and use the paper towel as a way to spread out more." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="4f00a6bf-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="4f00cdd1-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page3.cml">
                  <prompt>
                    <OTText id="4f00cdd2-a45d-11de-ab20-c126e5d7ed4e" text="22. One substance is made from polar molecules, and another substance is made from non-polar molecules that are similar in size and shape to the polar ones. Which substance has the higher boiling point?" />
                  </prompt>
                  <input>
                    <OTChoice id="4f00cdd3-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="4f00cdd4-a45d-11de-ab20-c126e5d7ed4e" text="the substance made from polar molecules" />
                        <OTText id="4f00cdd5-a45d-11de-ab20-c126e5d7ed4e" text="the substance made from non-polar molecules" />
                        <OTText id="4f00cdd6-a45d-11de-ab20-c126e5d7ed4e" text="Both have the same boiling point." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="4f00cdd4-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="4f011bf7-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page3.cml">
                  <prompt>
                    <OTText id="4f011bf8-a45d-11de-ab20-c126e5d7ed4e" text="23. What is the reason for your answer above?" />
                  </prompt>
                  <input>
                    <OTChoice id="4f011bf9-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="4f011bfa-a45d-11de-ab20-c126e5d7ed4e" text="Polar molecules form covalent bonds that are much stronger than non-polar bonds." />
                        <OTText id="4f011bfb-a45d-11de-ab20-c126e5d7ed4e" text="Non-polar molecules attract to all other kinds of molecules." />
                        <OTText id="4f011bfc-a45d-11de-ab20-c126e5d7ed4e" text="Molecules of similar size and shape attract to each other equally." />
                        <OTText id="4f011bfd-a45d-11de-ab20-c126e5d7ed4e" text="The intermolecular attractions of polar molecules are stronger than those of non-polar molecules." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="4f011bfd-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="5138474e-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page4.cml">
                  <prompt>
                    <OTText id="5138474f-a45d-11de-ab20-c126e5d7ed4e" text="24. A solid made of molecules that fit closely together will melt at" />
                  </prompt>
                  <input>
                    <OTChoice id="51384750-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="51384751-a45d-11de-ab20-c126e5d7ed4e" text="a lower temperature than loosely packed molecules" />
                        <OTText id="51384752-a45d-11de-ab20-c126e5d7ed4e" text="a higher temperature than loosely packed molecules" />
                        <OTText id="51384753-a45d-11de-ab20-c126e5d7ed4e" text="the same temperature as loosely packed molecules" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="51384752-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="51386e64-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page4.cml">
                  <prompt>
                    <OTText id="51386e65-a45d-11de-ab20-c126e5d7ed4e" text="25. Oil and water DO NOT mix. Why?" />
                  </prompt>
                  <input>
                    <OTChoice id="51386e66-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="51389577-a45d-11de-ab20-c126e5d7ed4e" text="Oil molecules repel water molecules." />
                        <OTText id="51389578-a45d-11de-ab20-c126e5d7ed4e" text="Water molecules repel oil molecules." />
                        <OTText id="51389579-a45d-11de-ab20-c126e5d7ed4e" text="Water molecules attract to other water molecules more strongly than to oil molecules." />
                        <OTText id="5138957a-a45d-11de-ab20-c126e5d7ed4e" text="Water molecules are non-polar, so they don't attract to oil molecules very well." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="51389579-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="5138bc8b-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page4.cml">
                  <prompt>
                    <OTText id="5138bc8c-a45d-11de-ab20-c126e5d7ed4e" text="26. What happens when salt dissolves in water?" />
                  </prompt>
                  <input>
                    <OTChoice id="5138bc8d-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="5138e39e-a45d-11de-ab20-c126e5d7ed4e" text="The salt ions attract to and are surrounded by water molecules." />
                        <OTText id="5138e39f-a45d-11de-ab20-c126e5d7ed4e" text="The salt reacts with the water to form a new substance." />
                        <OTText id="5138e3a0-a45d-11de-ab20-c126e5d7ed4e" text="The salt molecules change into water molecules." />
                        <OTText id="5138e3a1-a45d-11de-ab20-c126e5d7ed4e" text="The salt ions are destroyed when they come in contact with water." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="5138e39e-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="51390ab2-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page4.cml">
                  <prompt>
                    <OTText id="51390ab3-a45d-11de-ab20-c126e5d7ed4e" text="27. Sugar dissolves faster in hot water than in cold water. This is because the warmer temperature speeds up the rate at which sugar molecules" />
                  </prompt>
                  <input>
                    <OTChoice id="51390ab4-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="513931c5-a45d-11de-ab20-c126e5d7ed4e" text="form attractions to water molecules" />
                        <OTText id="513931c6-a45d-11de-ab20-c126e5d7ed4e" text="change into water molecules" />
                        <OTText id="513931c7-a45d-11de-ab20-c126e5d7ed4e" text="chemically react with water molecules" />
                        <OTText id="513931c8-a45d-11de-ab20-c126e5d7ed4e" text="are destroyed" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="513931c5-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="513958d9-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page4.cml">
                  <prompt>
                    <OTText id="513958da-a45d-11de-ab20-c126e5d7ed4e" text="28. Table salt (NaCl) dissolves easily in water, but silver chloride (AgCl) does not. Why?" />
                  </prompt>
                  <input>
                    <OTChoice id="513958db-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="513958dc-a45d-11de-ab20-c126e5d7ed4e" text="Ag and Cl ions attract better to themselves than to water molecules." />
                        <OTText id="51397fed-a45d-11de-ab20-c126e5d7ed4e" text="NaCl has a lower melting point than AgCl." />
                        <OTText id="5139a6fe-a45d-11de-ab20-c126e5d7ed4e" text="NaCl chemically reacts with water to form a new substance." />
                        <OTText id="5139a6ff-a45d-11de-ab20-c126e5d7ed4e" text="Ag and Cl ions are repelled by water molecules." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="513958dc-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="5139a700-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page4.cml">
                  <prompt>
                    <OTText id="5139ce11-a45d-11de-ab20-c126e5d7ed4e" text="29. Which of the following subatomic particles repel each other but are attracted to a nucleus?" />
                  </prompt>
                  <input>
                    <OTChoice id="5139ce12-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="5139ce13-a45d-11de-ab20-c126e5d7ed4e" text="protons" />
                        <OTText id="5139ce14-a45d-11de-ab20-c126e5d7ed4e" text="neutrons" />
                        <OTText id="5139ce15-a45d-11de-ab20-c126e5d7ed4e" text="electrons" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="5139ce15-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="5139f526-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page4.cml">
                  <prompt>
                    <OTText id="5139f527-a45d-11de-ab20-c126e5d7ed4e" text="30. The central atom of a molecule has two areas of electron density surrounding it. What is the geometry around this central atom?" />
                  </prompt>
                  <input>
                    <OTChoice id="5139f528-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="5139f529-a45d-11de-ab20-c126e5d7ed4e" text="a straight line" />
                        <OTText id="513a1c3a-a45d-11de-ab20-c126e5d7ed4e" text="a bent line" />
                        <OTText id="513a1c3b-a45d-11de-ab20-c126e5d7ed4e" text="a flat, triangular geometry" />
                        <OTText id="513a1c3c-a45d-11de-ab20-c126e5d7ed4e" text="a four-corner pyramid geometry" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="5139f529-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="513a434d-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page4.cml">
                  <prompt>
                    <OTText id="513a434e-a45d-11de-ab20-c126e5d7ed4e" text="31. The central atom of a molecule has three areas of electron density surrounding it and is bonded to three other atoms. What is the geometry around this central atom?" />
                  </prompt>
                  <input>
                    <OTChoice id="513a434f-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="513a4350-a45d-11de-ab20-c126e5d7ed4e" text="a straight line" />
                        <OTText id="513a4351-a45d-11de-ab20-c126e5d7ed4e" text="a bent line" />
                        <OTText id="513a4352-a45d-11de-ab20-c126e5d7ed4e" text="a flat, triangular geometry" />
                        <OTText id="513a4353-a45d-11de-ab20-c126e5d7ed4e" text="a four-corner pyramid geometry" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="513a4352-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="53cb9c94-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page5.cml">
                  <prompt>
                    <OTText id="53cb9c95-a45d-11de-ab20-c126e5d7ed4e" text="32. Why does methane (CH4) form a tetrahedral shape rather than remaining a flat molecule, as shown in the Lewis dot diagram above?" />
                  </prompt>
                  <input>
                    <OTChoice id="53cb9c96-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="53cb9c97-a45d-11de-ab20-c126e5d7ed4e" text="All of the hydrogen atoms attract to each other, causing the tetrahedral shape to occur." />
                        <OTText id="53cbc3a8-a45d-11de-ab20-c126e5d7ed4e" text="The carbon atom pulls equally on all of the electrons in the C-H bonds." />
                        <OTText id="53cbc3a9-a45d-11de-ab20-c126e5d7ed4e" text="The electron pairs shared in the C-H bonds repel each other, forming a tetrahedral molecule." />
                        <OTText id="53cbc3aa-a45d-11de-ab20-c126e5d7ed4e" text="Molecules can’t be flat. They all have three-dimensional shapes." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="53cbc3a9-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="53cbeabb-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page5.cml">
                  <prompt>
                    <OTText id="53cbeabc-a45d-11de-ab20-c126e5d7ed4e" text="33. Above is the Lewis dot diagram for COCl2. What is the most likely shape for this molecule?" />
                  </prompt>
                  <input>
                    <OTChoice id="53cbeabd-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="53cbeabe-a45d-11de-ab20-c126e5d7ed4e" text="linear" />
                        <OTText id="53cbeabf-a45d-11de-ab20-c126e5d7ed4e" text="bent" />
                        <OTText id="53cbeac0-a45d-11de-ab20-c126e5d7ed4e" text="tetrahedral (four-corner pyramid shape)" />
                        <OTText id="53cc11d1-a45d-11de-ab20-c126e5d7ed4e" text="trigonal planar (flat but shaped like a triangle)" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="53cc11d1-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="53cc11d2-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page5.cml">
                  <prompt>
                    <OTText id="53cc38e3-a45d-11de-ab20-c126e5d7ed4e" text="34. The Lewis dot diagram shown above has an unshared pair of electrons. This unshared pair of electrons" />
                  </prompt>
                  <input>
                    <OTChoice id="53cc38e4-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="53cc38e5-a45d-11de-ab20-c126e5d7ed4e" text="causes the molecule to lie flat in a plane" />
                        <OTText id="53cc38e6-a45d-11de-ab20-c126e5d7ed4e" text="causes the molecule to form a trigonal pyramidal shape" />
                        <OTText id="53cc38e7-a45d-11de-ab20-c126e5d7ed4e" text="causes the molecule to be bent" />
                        <OTText id="53cc38e8-a45d-11de-ab20-c126e5d7ed4e" text="has no effect on the shape of the molecule" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="53cc38e6-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="53cc5ff9-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page5.cml">
                  <prompt>
                    <OTText id="53cc5ffa-a45d-11de-ab20-c126e5d7ed4e" text="35. Three regions of electron density surround" />
                  </prompt>
                  <input>
                    <OTChoice id="53cc5ffb-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="53cc5ffc-a45d-11de-ab20-c126e5d7ed4e" text="Atom A" />
                        <OTText id="53cc5ffd-a45d-11de-ab20-c126e5d7ed4e" text="Atom B" />
                        <OTText id="53cc5ffe-a45d-11de-ab20-c126e5d7ed4e" text="Atom C" />
                        <OTText id="53cc5fff-a45d-11de-ab20-c126e5d7ed4e" text="Atoms A and B" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="53cc5ffe-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="53cc8710-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page5.cml">
                  <prompt>
                    <OTText id="53cc8711-a45d-11de-ab20-c126e5d7ed4e" text="36. Four regions of electron density surround" />
                  </prompt>
                  <input>
                    <OTChoice id="53cc8712-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="53cc8713-a45d-11de-ab20-c126e5d7ed4e" text="Atom A" />
                        <OTText id="53cc8714-a45d-11de-ab20-c126e5d7ed4e" text="Atom B" />
                        <OTText id="53cc8715-a45d-11de-ab20-c126e5d7ed4e" text="Atom C" />
                        <OTText id="53ccae26-a45d-11de-ab20-c126e5d7ed4e" text="Atoms A and B" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="53ccae26-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="53ccae27-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page5.cml">
                  <prompt>
                    <OTText id="53ccae28-a45d-11de-ab20-c126e5d7ed4e" text="37. Atoms form a covalent bond by" />
                  </prompt>
                  <input>
                    <OTChoice id="53ccae29-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="53ccae2a-a45d-11de-ab20-c126e5d7ed4e" text="sharing protons" />
                        <OTText id="53ccd53b-a45d-11de-ab20-c126e5d7ed4e" text="sharing neutrons" />
                        <OTText id="53cd235c-a45d-11de-ab20-c126e5d7ed4e" text="sharing electrons" />
                        <OTText id="53cd235d-a45d-11de-ab20-c126e5d7ed4e" text="getting close enough that their nuclei touch" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="53cd235c-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="53cd717e-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page5.cml">
                  <prompt>
                    <OTText id="53cd717f-a45d-11de-ab20-c126e5d7ed4e" text="38. A polar molecule MUST have" />
                  </prompt>
                  <input>
                    <OTChoice id="53cd7180-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="53cd7181-a45d-11de-ab20-c126e5d7ed4e" text="an overall positive charge" />
                        <OTText id="53cd7182-a45d-11de-ab20-c126e5d7ed4e" text="an overall negative charge" />
                        <OTText id="53cd7183-a45d-11de-ab20-c126e5d7ed4e" text="no overall charge" />
                        <OTText id="53cd9894-a45d-11de-ab20-c126e5d7ed4e" text="a part that has a positive charge and a part that has a negative charge" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="53cd9894-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="57876c45-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page6.cml">
                  <prompt>
                    <OTText id="57876c46-a45d-11de-ab20-c126e5d7ed4e" text="39. A bond formed between two atoms with a moderate difference in electronegativity is" />
                  </prompt>
                  <input>
                    <OTChoice id="57876c47-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="57879358-a45d-11de-ab20-c126e5d7ed4e" text="ionic" />
                        <OTText id="57879359-a45d-11de-ab20-c126e5d7ed4e" text="polar covalent" />
                        <OTText id="5787935a-a45d-11de-ab20-c126e5d7ed4e" text="non-polar covalent" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="57879359-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="5787935b-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page6.cml">
                  <prompt>
                    <OTText id="5787935c-a45d-11de-ab20-c126e5d7ed4e" text="40. What is the reason for your answer above?" />
                  </prompt>
                  <input>
                    <OTChoice id="5787935d-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="5787ba6e-a45d-11de-ab20-c126e5d7ed4e" text="Electronegativity is a measure of the charge of an atom." />
                        <OTText id="5787ba6f-a45d-11de-ab20-c126e5d7ed4e" text="Electronegativity is a measure of how well an atom holds on to its own electrons." />
                        <OTText id="5787ba70-a45d-11de-ab20-c126e5d7ed4e" text="Electronegativity is a measure of how well an atom can attract electrons from other atoms." />
                        <OTText id="5787ba71-a45d-11de-ab20-c126e5d7ed4e" text="Electronegativity is a measure of the size of an atom." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="5787ba70-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="5787e182-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page6.cml">
                  <prompt>
                    <OTText id="5787e183-a45d-11de-ab20-c126e5d7ed4e" text="41. A bond formed between two atoms that both have high electronegativity is" />
                  </prompt>
                  <input>
                    <OTChoice id="5787e184-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="5787e185-a45d-11de-ab20-c126e5d7ed4e" text="ionic" />
                        <OTText id="5787e186-a45d-11de-ab20-c126e5d7ed4e" text="polar covalent" />
                        <OTText id="5787e187-a45d-11de-ab20-c126e5d7ed4e" text="non-polar covalent" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="5787e187-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="57880898-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page6.cml">
                  <prompt>
                    <OTText id="57880899-a45d-11de-ab20-c126e5d7ed4e" text="42. A molecule that is polar must contain" />
                  </prompt>
                  <input>
                    <OTChoice id="5788089a-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="5788089b-a45d-11de-ab20-c126e5d7ed4e" text="all polar covalent bonds" />
                        <OTText id="57882fac-a45d-11de-ab20-c126e5d7ed4e" text="mostly non-polar bonds and one polar bond" />
                        <OTText id="57882fad-a45d-11de-ab20-c126e5d7ed4e" text="one or more non-polar bonds" />
                        <OTText id="57882fae-a45d-11de-ab20-c126e5d7ed4e" text="one or more polar bonds" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="57882fad-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="57882faf-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page6.cml">
                  <prompt>
                    <OTText id="57882fb0-a45d-11de-ab20-c126e5d7ed4e" text="43. In a non-polar covalent bond, both atoms have an identical or very similar charge. Why?" />
                  </prompt>
                  <input>
                    <OTChoice id="57882fb1-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="578855c2-a45d-11de-ab20-c126e5d7ed4e" text="Electrons are shared evenly in non-polar covalent bonds." />
                        <OTText id="578855c3-a45d-11de-ab20-c126e5d7ed4e" text="The charge is determined by the distance between the atoms." />
                        <OTText id="578855c4-a45d-11de-ab20-c126e5d7ed4e" text="Non-polar atoms are made from neutrons, which have no charge." />
                        <OTText id="578855c5-a45d-11de-ab20-c126e5d7ed4e" text="The polarity of each atom is canceled out, which makes the bond non-polar." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="578855c2-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="578855c6-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page6.cml">
                  <prompt>
                    <OTText id="578855c7-a45d-11de-ab20-c126e5d7ed4e" text="44. Melting water is NOT a chemical reaction. Why?" />
                  </prompt>
                  <input>
                    <OTChoice id="578855c8-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="57887cd9-a45d-11de-ab20-c126e5d7ed4e" text="The temperature is not high enough." />
                        <OTText id="57887cda-a45d-11de-ab20-c126e5d7ed4e" text="No chemical bonds are broken." />
                        <OTText id="57887cdb-a45d-11de-ab20-c126e5d7ed4e" text="No chemical bonds are formed." />
                        <OTText id="57887cdc-a45d-11de-ab20-c126e5d7ed4e" text="Both B and C" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="57887cdc-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="57887cdd-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page6.cml">
                  <prompt>
                    <OTText id="57887cde-a45d-11de-ab20-c126e5d7ed4e" text="45. If the temperature of a chemical reaction is increased, the speed of the reaction is typically" />
                  </prompt>
                  <input>
                    <OTChoice id="5788a3ef-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="5788a3f0-a45d-11de-ab20-c126e5d7ed4e" text="increased" />
                        <OTText id="5788a3f1-a45d-11de-ab20-c126e5d7ed4e" text="decreased" />
                        <OTText id="5788a3f2-a45d-11de-ab20-c126e5d7ed4e" text="not affected" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="5788a3f0-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="5788cb03-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page6.cml">
                  <prompt>
                    <OTText id="5788cb04-a45d-11de-ab20-c126e5d7ed4e" text="46. What is the reason for your answer above?" />
                  </prompt>
                  <input>
                    <OTChoice id="5788f215-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="5788f216-a45d-11de-ab20-c126e5d7ed4e" text="Reactants at a higher temperature interact less often than reactants at a cooler temperature." />
                        <OTText id="5788f217-a45d-11de-ab20-c126e5d7ed4e" text="Reactants at a higher temperature collide more often than reactants at a cooler temperature." />
                        <OTText id="5788f218-a45d-11de-ab20-c126e5d7ed4e" text="Reactants at a higher temperature stick together better than reactants at a cooler temperature." />
                        <OTText id="5788f219-a45d-11de-ab20-c126e5d7ed4e" text="The speed of a reaction cannot be changed." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="5788f217-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="5a6d4d5a-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page7.cml">
                  <prompt>
                    <OTText id="5a6d4d5b-a45d-11de-ab20-c126e5d7ed4e" text="47. A concentrated acid is more reactive, and therefore more dangerous, than a dilute acid. This is because the molecules of a concentrated acid" />
                  </prompt>
                  <input>
                    <OTChoice id="5a6d4d5c-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="5a6d4d5d-a45d-11de-ab20-c126e5d7ed4e" text="form a different substance than they do in a dilute acid" />
                        <OTText id="5a6d746e-a45d-11de-ab20-c126e5d7ed4e" text="have more collisions with whatever they are reacting with than the molecules of a dilute acid" />
                        <OTText id="5a6d746f-a45d-11de-ab20-c126e5d7ed4e" text="form stronger bonds with whatever they are reacting with than the molecules of the dilute acid" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="5a6d746e-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="5a6d9b80-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page7.cml">
                  <prompt>
                    <OTText id="5a6d9b81-a45d-11de-ab20-c126e5d7ed4e" text="48. Which of the following must be the same for both the reactants and products of a chemical reaction?" />
                  </prompt>
                  <input>
                    <OTChoice id="5a6d9b82-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="5a6d9b83-a45d-11de-ab20-c126e5d7ed4e" text="the total mass" />
                        <OTText id="5a6d9b84-a45d-11de-ab20-c126e5d7ed4e" text="the total number of molecules" />
                        <OTText id="5a6d9b85-a45d-11de-ab20-c126e5d7ed4e" text="the total number of atoms of each element" />
                        <OTText id="5a6dc296-a45d-11de-ab20-c126e5d7ed4e" text="both A and B" />
                        <OTText id="5a6dc297-a45d-11de-ab20-c126e5d7ed4e" text="both A and C" />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="5a6dc296-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="5a6de9a8-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page7.cml">
                  <prompt>
                    <OTText id="5a6de9a9-a45d-11de-ab20-c126e5d7ed4e">
                      <text>     CH4 + O2 → CO2 + 2 H2O
49. What is one reason the above equation is NOT balanced correctly?</text>
                    </OTText>
                  </prompt>
                  <input>
                    <OTChoice id="5a6de9aa-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="5a6de9ab-a45d-11de-ab20-c126e5d7ed4e" text="The reaction starts with fewer carbon atoms than it ends with." />
                        <OTText id="5a6de9ac-a45d-11de-ab20-c126e5d7ed4e" text="The reaction starts with fewer hydrogen atoms than it ends with." />
                        <OTText id="5a6e10bd-a45d-11de-ab20-c126e5d7ed4e" text="The reaction starts with fewer oxygen atoms than it ends with." />
                        <OTText id="5a6e10be-a45d-11de-ab20-c126e5d7ed4e" text="All of the above." />
                      </choices>
                    </OTChoice>
                  </input>
                  <correctAnswer>
                    <object refid="5a6e10bd-a45d-11de-ab20-c126e5d7ed4e" />
                  </correctAnswer>
                </OTQuestion>
                <OTQuestion id="5a6f222f-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page7.cml">
                  <prompt>
                    <OTText id="5a6f2230-a45d-11de-ab20-c126e5d7ed4e">
                      <text>50. The following diagram represents a mixture of S atoms and O2 molecules in a closed container: 
Which diagram below shows the results after the mixture reacts as completely as possible according to the equation?</text>
                    </OTText>
                  </prompt>
                  <input>
                    <OTChoice id="5a6f2231-a45d-11de-ab20-c126e5d7ed4e" selectionUI="0">
                      <choices>
                        <OTText id="5a6f2232-a45d-11de-ab20-c126e5d7ed4e" text="Diagram a" />
                        <OTText id="5a6f4943-a45d-11de-ab20-c126e5d7ed4e" text="Diagram b" />
                        <OTText id="5a6f4944-a45d-11de-ab20-c126e5d7ed4e" text="Diagram c" />
                        <OTText id="5a6f4945-a45d-11de-ab20-c126e5d7ed4e" text="Diagram d" />
                        <OTText id="5a6f4946-a45d-11de-ab20-c126e5d7ed4e" text="Diagram e" />
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                <OTQuestion id="5a6f7057-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page7.cml">
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                    <OTText id="5a6f7058-a45d-11de-ab20-c126e5d7ed4e" text="51. What is the limiting reactant in the reaction shown in Question 50?" />
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                        <OTText id="5a6f705a-a45d-11de-ab20-c126e5d7ed4e" text="sulfur (S)" />
                        <OTText id="5a6f705b-a45d-11de-ab20-c126e5d7ed4e" text="oxygen (O2)" />
                        <OTText id="5a6f705c-a45d-11de-ab20-c126e5d7ed4e" text="sulfur trioxide (SO3)" />
                        <OTText id="5a6f976d-a45d-11de-ab20-c126e5d7ed4e" text="both sulfur and oxygen" />
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                <OTQuestion id="5a6fbe7e-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page7.cml">
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                    <OTText id="5a6fbe7f-a45d-11de-ab20-c126e5d7ed4e" text="52. What kind of reaction is shown above?" />
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                        <OTText id="5a6fbe81-a45d-11de-ab20-c126e5d7ed4e" text="synthesis" />
                        <OTText id="5a6fbe82-a45d-11de-ab20-c126e5d7ed4e" text="decomposition" />
                        <OTText id="5a6fbe83-a45d-11de-ab20-c126e5d7ed4e" text="single replacement" />
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                <OTQuestion id="5a6fe594-a45d-11de-ab20-c126e5d7ed4e" name="http://ri-itest.concord.org/SAMActivities/MCI-chem/ChemMCI_v1/page7.cml">
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                    <OTText id="5a6fe595-a45d-11de-ab20-c126e5d7ed4e" text="53. What kind of reaction is shown above?" />
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                        <OTText id="5a6fe597-a45d-11de-ab20-c126e5d7ed4e" text="synthesis" />
                        <OTText id="5a6fe598-a45d-11de-ab20-c126e5d7ed4e" text="decomposition" />
                        <OTText id="5a700ca9-a45d-11de-ab20-c126e5d7ed4e" text="single replacement" />
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