15_Light_and_Atoms_Compiled_Questions_v2

Astronomy Assessment and TPS Questions: Light and Atoms 1. Energy is released from atoms in the form of light when electrons a. move from high energy levels to low energy levels. b. move in their orbit around the nucleus. c. move from low energy levels to high energy levels. d. are emitted by the atom. e. are absorbed by atoms. 2. If an electron in an atom moves from an energy level of 5 to an energy level of 10, a. a photon of energy 5 is emitted. b. a photon of energy 15 is emitted. c. a photon of energy 5 is absorbed. d. a photon of energy 15 is absorbed. 3. If an electron in an atom moves from an energy level of 10 to an energy level of 5, a. a photon of energy 5 is emitted. b. a photon of energy 15 is emitted. c. a photon of energy 5 is absorbed. d. a photon of energy 15 is absorbed. 4. If an electron in an atom moves from an energy level of 3 to an energy level of 6, a. a photon of energy 3 is absorbed. b. a photon of energy 9 is emitted. c. a photon of energy 3 is emitted. d. a photon of energy 9 is absorbed. 5. How does the Sun produce the energy that heats our planet? a. The gases inside our Sun are burning and producing energy. b. Light atoms are combined into heavier atoms, giving off energy. c. Gas inside the Sun heats up when compressed, giving off energy. d. Atoms are broken apart into lighter atoms, giving off energy. e. The core of the Sun has radioactive atoms that decay, giving off energy. 6. In which part of the Sun does nuclear fusion take place? a. photosphere b. corona c. core d. radiative layer e. nucleosphere Center for Astronomy Education University of Arizona

Use the drawings below to answer the next two questions. 7. Which drawing (not to scale) represents the process by which an absorption line is formed? 8. Which drawing (not to scale) represents the process by which an emission line is formed? Use the drawings below to answer the next two questions. 9. Which atom would be absorbing light with the greatest energy? 10. Which atom would emit light with the shortest wavelength? Use the diagram below to answer the following three questions. Below is the energy level diagram of a particular atom. The amount of energy it takes to move an electron from the lowest energy level (or ground level) up to each of the higher energy levels (or excited energy levels) is shown next to each energy level. Center for Astronomy Education University of Arizona e - B e - C e - D e - A A. B.C. D. e - e - e - e -

14. How many photons of different energy can be emitted from this atom? a. 3 b. 5 c. 6 d. 12 e. None of the above is correct. 15. With the electron in the energy level labeled with the number “8”, how many photons of different energy can be emitted by this atom? a. None b. Only one c. Two d. Three e. More than three 16. Which of the following would result in a photon being emitted from the atom with the longest possible wavelength. a. If an electron dropped from level 9 to level 0. b. If an electron jumped from level 0 to level 9 c. If an electron dropped from level 9 to level 8 d. If an electron jumped from level 8 to level 9 e. None of the above is correct 17. Each of the drawings (A-D) shows a molecule at two different times: once before and once after a photon of light has either been emitted or absorbed. Which drawing corresponds to the absorption of a photon with the shortest wavelength? Center for Astronomy Education University of Arizona 9 8 5 0

Use the diagram below to answer the following two questions. Below is the energy level diagram of a particular atom. The amount of energy it takes to move an electron from the lowest energy level (or ground level) up to each of the higher energy levels (or excited energy levels) is shown next to each energy level. Center for Astronomy Education University of Arizona 12 9 5 Before A After Before B After After Before C After Before D

d. Electron, photon 24. When a(n) _______ is absorbed, the energy causes a(n) ________ to move to a higher energy level. a. photon, electron b. electron, photon c. atom, electron d. electron, atom 25. An emission line is formed when: a. an electron goes from a high energy level to a low energy level. b. an electron goes from a low energy level to a high energy level. c. an electron is emitted from the atom. d. an electron moves in its orbit around the nucleus of the atom. 26. When an atom absorbs light, which of the following occurs? a. An electron goes from a high energy level to a low energy level. b. An electron goes from a low energy level to a high energy level. c. A photon goes from a high energy level to a low energy level. d. A photon goes from a low energy level to a high energy level. 27. When light is absorbed by an atom, electrons _________. a. From the light are also absorbed by the atom b. Are always emitted from the atom c. Move from low energy levels to high energy levels d. Move from high energy levels to low energy levels e. Move in orbit around the nucleus of the photon 28. What is ionization? a. The process of a photon being ejected from an atom b. The process of an electron being ejected from an atom c. The process of a photon jumping to a higher energy level d. The process of an electron jumping to a higher energy level 29. An electron that makes a bigger jump will emit a photon that is ________. a. Travelling faster b. Travelling slower c. More blue d. More red 30. If all of the electrons in an atom are at ground state, which of the following is impossible? a. It is impossible for the atom to absorb a photon of light with a long wavelength. b. It is impossible for the atom to emit a photon of light with a short wavelength. c. It is impossible for ionization to occur. d. It is impossible for the atom to absorb blue light. Center for Astronomy Education University of Arizona

Below is the energy level diagram of a particular atom. The amount of energy it takes to move an electron from the lowest energy level (or ground level) up to each of the higher energy levels (or excited energy levels) is shown next to each energy level. 31. Using the diagram above, between which two energy levels would it take the most energy to move the electron? a. Level 0 to 5 b. Level 5 to 8 c. Level 8 to 10 Below is the energy level diagram of a particular atom. The amount of energy it takes to move an electron from the lowest energy level (or ground level) up to each of the higher energy levels (or excited energy levels) is shown next to each energy level. 16--------------------------------------------------------------- 14--------------------------------------------------------------- Center for Astronomy Education University of Arizona 10 8 5 0 0

36. Using the diagram above, which of the pictures shows the atom that is emitting the light with the shortest wavelength? a. A b. B c. C d. D 37. Using the diagram above, which of the pictures shows the atom that is absorbing the light with the lowest frequency? a. A b. B c. C d. D Center for Astronomy Education University of Arizona