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