A) asteroid
B) star
C) planet
D) nebula
- 2. The physical state of the sun is a _____
A) solid
B) liquid
C) plasma
D) gas
- 3. Where is the sun the hottest?
A) In its corona
B) In its core
C) In its radiative layer
D) In its convective later
- 4. Where is the sun the coolest?
A) In its radiative layer
B) In its corona
C) In its photosphere
D) In its chromosphere
- 5. What element is most plentiful on the sun?
A) oxygen
B) carbon
C) helium
D) hydrogen
- 6. What is the primary atomic reaction that occurs within the Sun that converts hydrogen atoms into helium atoms?
A) nuclear explosions
B) nuclear fission
C) nuclear fusion
D) nuclear combustion
- 7. Are sunspots hotter or colder than the surrounding areas?
A) hotter
B) cooler
C) temperature is the same
- 8. The Sun is largest object in the solar system. What percentage of the solar system's mass does it contain?
A) 99%
B) 87%
C) 76%
D) 81%
- 9. What lies above the photosphere?
A) chromosphere
B) corona
C) convective layer
D) solar flares
- 10. What does nuclear fusion make?
A) energy
B) wind
C) magnets
D) light
- 11. What is the inner layer of the sun called?
A) corona
B) chromosphere
C) convective layer
D) core
- 12. Our sun is classified as a _____ star.
A) M3
B) S1
C) K9
D) G2
- 13. When the sun ends its life, what will it become?
A) a white dwarf
B) a neutron star
C) a blue giant
D) a pulsar
- 14. A steady flow of particles streaming out from the Sun in all directions.
A) solar wind
B) solar flare
C) chromosphere
D) photosphere
- 15. A dark, temporary, relatively cool spot on the surface of the sun
A) corona
B) solar wind
C) chromosphere
D) sun spots
- 16. What are dense clouds of material suspended above the surface of the sun by loops of magnetic field called?
A) sun spots
B) prominences
C) chromospheres
D) photospheres
- 17. Tremendous explosions of intense magnetic high energy radiation from the surface of the sun are also known as _____.
A) chromospheres
B) solar flares
C) photospheres
D) coronas
- 18. The visible surface of the sun is called the _____.
A) solar flare
B) photosphere
C) solar wind
D) prominence
- 19. A layer in a star’s atmosphere lying below the corona and above the photosphere
A) sun spots
B) chromosphere
C) solar wind
D) prominence
- 20. The outer atmosphere of the sun or a star
A) corona
B) prominence
C) solar flare
D) photosphere
- 21. A huge eruption of electrified, magnetic bubbles of gas ejected from the solar corona with magnetic field lines are called _____.
A) solar flare
B) chromosphere
C) coronal mass ejection
D) sun spots
- 22. Convective cells of the Sun where hot solar material comes to the solar surface
A) prominences
B) sun spots
C) CME's
D) granules
- 23. The next layer out from the core is this zone which emits radiation
A) radiative layer
B) lithosphere
C) chromosphere
D) photosphere
- 24. Differential rotation refers to the fact that the sun regions rotate
A) around the equator
B) at different speeds
C) from the inner core to the outer core
D) in opposite directions
- 25. A set of magnetic field lines that wind more than once around some common axial field line is called a _____.
A) solar wind
B) solar flux rope
C) sun spots
D) solar corona
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