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                <OTQuestion id="cedd8297-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page1.cml">
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                    <OTText id="cedf7e68-9edc-11dd-9fbf-9b2e20df966a" text="List an example of light being emitted and absorbed." />
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                    <OTText id="cee068ca-9edc-11dd-9fbf-9b2e20df966a" text="1300 m/s" />
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                <OTQuestion id="d696be7b-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page2.cml">
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                    <OTText id="d696be7c-9edc-11dd-9fbf-9b2e20df966a" text="Experiment by changing the velocity. Can you figure out the slowest velocity the blue atom can have and still excite the green atom? " />
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                        <OTText text="1000 m/s" />
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                    <OTText id="d69781d3-9edc-11dd-9fbf-9b2e20df966a" text="What is associated with a drop in kinetic energy?" />
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                        <OTText text="An increase in potential energy." />
                        <OTText text="An atom returning to its ground state." />
                        <OTText text="An atom going into an excited state." />
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                <OTQuestion id="d697a8e9-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page2.cml">
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                    <OTText id="d697a8ea-9edc-11dd-9fbf-9b2e20df966a" text="&#xA;Compare the movement of the atoms at 1000 m/s and at 2000 m/s. Describe the changes for each atom." />
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                <OTQuestion id="d7f7fc3d-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page3.cml">
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                    <OTText id="d7f8234e-9edc-11dd-9fbf-9b2e20df966a" text="What is true of the minimum energy needed to excite atoms C and D?" />
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                        <OTText text="Each atom requires the same energy to be excited." />
                        <OTText text="Atom C requires more energy to be excited." />
                        <OTText id="d7f82352-9edc-11dd-9fbf-9b2e20df966a" text="Atom D requires more energy to be excited." />
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                    <OTText id="d7f84a64-9edc-11dd-9fbf-9b2e20df966a" text="Explain your answer to the previous question." />
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                    <OTText id="d7f84a65-9edc-11dd-9fbf-9b2e20df966a" text="" />
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                <OTQuestion id="d932ed47-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page4.cml">
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                    <OTText id="d932ed48-9edc-11dd-9fbf-9b2e20df966a" text="&#xA;Place a snapshot of the orbital of the hydrogen atom above that shows it in a state that might represent an excited state." />
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                    <OTText id="d933d7ab-9edc-11dd-9fbf-9b2e20df966a" text="What relationship do you see between the distance electrons can be found from the nucleus and the energy level of the electrons?" />
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                        <OTText text="The closer the electrons are to the center of the atom the higher their energy." />
                        <OTText id="d933d7ae-9edc-11dd-9fbf-9b2e20df966a" text="The farther the electrons are from the center of the atom the higher their energy" />
                        <OTText text="There is no relationship between the distance of electrons from the nucleus and their energy." />
                        <OTText text="The ground state electrons have the highest energy and can be found farthest from the nucleus." />
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                    <OTText id="da40dae2-9edc-11dd-9fbf-9b2e20df966a" text="If you want the purple atom to be easily excited, the energy levels should be: " />
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                        <OTText id="da40dae4-9edc-11dd-9fbf-9b2e20df966a" text="close together (small difference in electron energy levels)." />
                        <OTText text="moderately far apart (medium difference in energy levels)." />
                        <OTText text="far apart (large difference in energy levels)." />
                        <OTText text="any difference. It doesn’t matter." />
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                    <OTText id="da415019-9edc-11dd-9fbf-9b2e20df966a" text="Reset the model and try setting the energy levels so that they have a difference of 1.20 electron volt between them. (❐ help) At some point, when you run the model, you should see some of the kinetic energy of the atoms “disappear.” Where does this energy go? Try to notice a change in the energy level diagram when this happens. (❐ help)" />
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                  <prompt>
                    <OTText id="db34b0cd-9edc-11dd-9fbf-9b2e20df966a" text="Describe what you observed as you adjusted the intensity slider (comment on the energy, color and number of photons per unit time). " />
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                    <OTText id="db34b0ce-9edc-11dd-9fbf-9b2e20df966a" text="" />
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                <OTQuestion id="db34d7e0-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page6.cml">
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                    <OTText id="db34d7e1-9edc-11dd-9fbf-9b2e20df966a" text="Describe what you observed as you adjusted the frequency slider (comment on the energy, color and number of photons per unit time). " />
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                    <OTText id="db34d7e2-9edc-11dd-9fbf-9b2e20df966a" text="" />
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                    <OTText id="dc562665-9edc-11dd-9fbf-9b2e20df966a" text="The photon emitted from atom C has " />
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                        <OTText text="higher energy than the one produced by atom D." />
                        <OTText id="dc564d78-9edc-11dd-9fbf-9b2e20df966a" text="lower energy than the one produced by atom D." />
                        <OTText text="the same as the one produced by atom D." />
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                    <OTText id="dc56748b-9edc-11dd-9fbf-9b2e20df966a" text="Why do the atoms slow down when they produce a photon?" />
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                    <OTText id="dc56748c-9edc-11dd-9fbf-9b2e20df966a" text="" />
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                <OTQuestion id="dd5a01de-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page8.cml">
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                    <OTText id="dd5a01df-9edc-11dd-9fbf-9b2e20df966a" text="What did you have to do to get the incoming photons to excite atom B?" />
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                    <OTText id="dd5a5000-9edc-11dd-9fbf-9b2e20df966a" text="" />
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                <OTQuestion id="dd5ac532-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page8.cml">
                  <prompt>
                    <OTText id="dd5ac533-9edc-11dd-9fbf-9b2e20df966a" text="Try getting both of the atoms to absorb photons, but not with identical energy levels. What is the same about the two atoms when this happens? " />
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                    <OTChoice id="dd5ac534-9edc-11dd-9fbf-9b2e20df966a" selectionUI="0">
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                        <OTText text="They are both the same kind of atom." />
                        <OTText text="They absorb photons of the same energy/frequency." />
                        <OTText text="The difference between the lower and upper energy levels is the same." />
                        <OTText id="dd5aec48-9edc-11dd-9fbf-9b2e20df966a" text="Both B and C." />
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                    <OTText id="de8f268a-9edc-11dd-9fbf-9b2e20df966a" text="As you change the frequency of the photons coming out from the light source, what changes do you observe in the energies of the photons?" />
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                    <OTText id="de8f268b-9edc-11dd-9fbf-9b2e20df966a" text="" />
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                <OTQuestion id="de8f74ad-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page9.cml">
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                    <OTText id="de8f74ae-9edc-11dd-9fbf-9b2e20df966a" text="What relationship do you see between the energy of the photons and the energy levels of the atoms that can be excited by these photons?" />
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                    <OTText id="de8f9bbf-9edc-11dd-9fbf-9b2e20df966a" text="" />
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                <OTQuestion id="dfa810a1-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page10.cml">
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                    <OTText id="dfa810a2-9edc-11dd-9fbf-9b2e20df966a" text="Why do the pink and green atoms emit different kinds of photons?" />
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                    <OTText id="dfa810a3-9edc-11dd-9fbf-9b2e20df966a" text="" />
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                <OTQuestion id="dfa837b5-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page10.cml">
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                    <OTText id="dfa837b6-9edc-11dd-9fbf-9b2e20df966a" text="Why is it easier to excite the green atoms?" />
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                    <OTText id="dfa85ec7-9edc-11dd-9fbf-9b2e20df966a" text="" />
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                <OTQuestion id="e0c7b179-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page11.cml">
                  <prompt>
                    <OTText id="e0c7b17a-9edc-11dd-9fbf-9b2e20df966a" text="&#xA;Place the snapshot that shows the purple atoms producing green photons." />
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                    <OTImage id="e0c7b17b-9edc-11dd-9fbf-9b2e20df966a" />
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                <OTQuestion id="e0c7d88c-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page11.cml">
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                    <OTText id="e0c7d88d-9edc-11dd-9fbf-9b2e20df966a" text="&#xA;Place the snapshot below that shows the purple atoms producing infrared photons." />
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                <OTQuestion id="e0c7ff9f-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page11.cml">
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                    <OTText id="e0c7ffa0-9edc-11dd-9fbf-9b2e20df966a" text="What happens if you have an atom with many different possible energy levels:" />
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                        <OTText text="It takes more energy to make the atom go to a higher energy level." />
                        <OTText text="You get more photons from the atom." />
                        <OTText id="e0c826b4-9edc-11dd-9fbf-9b2e20df966a" text="You get more types of photons from the atom." />
                        <OTText text="The atom will stay in a higher energy state without giving off photons." />
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                <OTQuestion id="e0c84dc6-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page11.cml">
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                    <OTText id="e0c84dc7-9edc-11dd-9fbf-9b2e20df966a" text="How can you tell the difference between two different atom just by looking at the light they give of when heated?" />
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                    <OTChoice id="e0c84dc8-9edc-11dd-9fbf-9b2e20df966a" selectionUI="0">
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                        <OTText text="Different atoms have different colors, so they give off different light." />
                        <OTText text="Different atoms require different amounts of heat to give off light." />
                        <OTText text="Some atoms don't give off any light, and other do." />
                        <OTText id="e0c874dc-9edc-11dd-9fbf-9b2e20df966a" text="Each type of atom has a unique set of energy levels and gives off a unique set of photons." />
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                <OTQuestion id="e1b6a56d-9edc-11dd-9fbf-9b2e20df966a" name="http://ri-itest.concord.org/SAMActivities/EnergeticStatesAndPhotons/EnergeticStatesAndPhotons_v2/page12.cml">
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                    <OTText id="e1b6a56e-9edc-11dd-9fbf-9b2e20df966a" text="When two balls collide with each other they bounce away from each other with the same kinetic energy they had when they collided. This can happen for atoms too. However, sometimes the atoms have less kinetic energy after a collision. Explain what must have happened to the lost kinetic energy." />
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                    <OTText id="e1b6cc82-9edc-11dd-9fbf-9b2e20df966a" text="Give one reason it would take more energy to excite on kind of atom when compared to another?" />
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                    <OTText id="e1b8a146-9edc-11dd-9fbf-9b2e20df966a" text="If an atom had an energy diagram that looked like the image on the left, which transition between levels would cause the atoms to give off its lowest energy photon:" />
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                        <OTText text="From level 3⇝4." />
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                        <OTText text="From level 2⇝3." />
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                    <OTText id="e1b8ef6d-9edc-11dd-9fbf-9b2e20df966a" text="If an atom goes from a very high energy state to a very low energy state what kind of photon must be emitted?" />
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                    <OTText id="e1b964a3-9edc-11dd-9fbf-9b2e20df966a" text="When an atom absorbs a photon it is very picky about which photons can excite it. Why is this?" />
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                        <OTText text="It depends on the direction the atom is moving. If it moves in the right direction it can absorb any photon." />
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