Identify the Choice That Best Completes the Statement Or Answers the Question s5

Ch 29 Review

Multiple Choice Identify the choice that best completes the statement or answers the question.

____ 1. The sun converts matter into energy in the a. corona. c. radiative zone. b. convective zone. d. core.

____ 2. Most of the sun’s energy is a result of a. nuclear fusion. c. atomic reactions. b. nuclear fission. d. coronal mass ejection.

____ 3. When hydrogen nuclei fuse into helium nuclei a. the nuclei die. c. particles collide. b. energy is released. d. particles neutralize.

____ 4. In the sun’s radiative zone, energy moves a. by convection. c. by solar wind. b. by radiation. d. by solar ejection.

____ 5. The magnetic field of the sun’s corona a. stops some subatomic particles. c. cannot stop any subatomic particles. b. stops all subatomic particles. d. causes Earth to be polarized.

____ 6. Auroras are frequently seen a. near the equator. c. before a sunspot cycle. b. after solar flares. d. every 11 years.

____ 7. What temperature can a solar flare reach? a. 15,000,000°C c. 20,000,000°C b. 1,000,000°C d. 2,000,000°C

____ 8. Which of the following is NOT a solar ejection? a. solar flare c. prominence b. coronal mass ejection d. sunspot

____ 9. Sunspots vary in a cycle that lasts about a. 100,000 years. c. 110 years. b. 1,100 years. d. 11 years.

____ 10. Strong magnetic fields on regions of the sun lead to sunspots because a. convection slows and energy decreases. b. convection increases and energy increases. c. radiation slows and energy decreases. d. radiation increases and energy increases. ____ 11. In the equation E=mc2, the letter c represents a. the energy that is produced. c. the speed of light. b. the mass that is converted. d. the distance to Earth from the sun.

____ 12. What is the hottest layer of the sun’s atmosphere called? a. convective zone c. radiative zone b. corona d. photosphere

____ 13. Energy produced in the sun’s core is the result of a. nuclear division. c. nuclear fusion. b. nuclear fission. d. nuclear fissure.

____ 14. The temperature of the sun’s core is approximately a. 15,000,000°C. c. 4,000°C. b. 20,000,000°C. d. 150,000°C.

____ 15. How do sunspots form? a. Magnetic fields increase energy transfer in the convective zone. b. Magnetic fields reduce energy transfer in the convective zone. c. The radiative zone reduces energy transfer to the core. d. The core shuts down and reduces energy transfer.

____ 16. What elements make up most of the sun’s mass? a. carbon and oxygen c. helium and nitrogen b. carbon and hydrogen d. hydrogen and helium

____ 17. Which of the following are part of the sun’s atmosphere? a. nucleus and core c. photosphere and chromosphere b. radiative zone and convective zone d. aurora and borealis

____ 18. Particles thrown off the sun’s corona that can affect Earth’s magnetic field are called a. a coronal mass injection. c. nuclear fusion. b. a coronal mass ejection. d. a sunspot.

____ 19. During nuclear fusion in the sun, which of the following occurs? a. Atomic nuclei split apart. b. The aurora australis appears. c. Hydrogen nuclei combine to produce a helium nucleus. d. A solar eclipse results.

____ 20. Einstein’s equation E = mc2 helps scientists understand the sun’s energy because the equation a. describes nuclear fission. b. explains how mass can be converted into huge amounts of energy. c. describes solar flares. d. explains a star’s specific wavelengths of light.

____ 21. Scientists break up the sun’s light into a spectrum using a device called a a. corona. c. positron. b. spectrograph. d. chromograph. ____ 22. How does the sun’s radiative zone compare with the convective zone? a. The convective zone is hotter and closer to the sun’s core. b. The radiative zone is cooler and closer to the sun’s core. c. The convective zone is cooler and closer to the sun’s core. d. The radiative zone is hotter and closer to the sun’s core.

____ 23. What is a prominence on the sun? a. a part of the sun’s corona, a cloud of colored gas b. a disturbance in the sun’s atmosphere; an arched, glowing cloud of gas c. a part of the convective zone, a cool area with powerful magnetic fields d. a magnetic disruption in the sun’s photosphere

____ 24. Which of the following are all part of the sun’s atmosphere? a. photosphere, aurora, corona c. photosphere, corona, chromosphere b. chromosphere, aurora, photosphere d. convective zone, photosphere, corona

____ 25. During fusion, a type of subatomic particle is given off called a(n) a. atom. c. neutrino. b. nuclei. d. prominence.

____ 26. One of the final products of the fusion of two hydrogen nuclei in the sun is always a. a helium nucleus. b. a more-massive hydrogen nucleus. c. hydrogen protons. d. two nuclei made up of two neutrons and one proton.

____ 27. Sudden disturbances in Earth’s magnetic field are called a. geomagnetic storms. c. prominences. b. sunspots. d. solar-activity cycles.

____ 28. What are northern lights? a. coronas c. solar flares b. prominences d. auroras

____ 29. Magnetic fields on the sun are produced by the sun’s uneven rotation and a. the movement of sunspots on the sun’s surface. b. the movement of gases in the corona. c. gases in the convective zone. d. gases in the radiation zone.

____ 30. Auroras form when charged particles from solar wind a. react with particles in Earth’s atmosphere. b. magnetize the Earth’s poles. c. react with particles in Earth’s hydrosphere. d. magnetize the sun’s atmosphere.