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Astronomy Practice Quiz 3: Stars
1. The source of the Sun’s energy is ____.
a. chemical burning
b. nuclear division
Name: _________________
c. nuclear fusion
2. About 90 percent of stars on the H-R diagram are ____.
a. supergiants b. main-sequence stars c. white dwarfs
3. All stars, regardless of size, eventually ____.
a. turn into black dwarfs
b. explode
d. photosynthesis
d. black holes
c. run out of fuel and collapse
4. The Sun is a ____.
a. black hole
b. black dwarf c. main-sequence star
d. become black holes
d. red giant
5. Massive stars terminate in a brilliant explosion called a ____.
a. red giant
b. protostar
c. neutron star d. supernova
6. What is the next stage in the Sun’s life cycle?
a. white dwarf b. red giant
c. planetary nebula
d. black dwarf
7. According to Figure 25-1, which main-sequence stars
are brightest?
a. the smallest
b. the coolest
c. the hottest
d. none of the above
8. In the H-R diagram above, which letter represents the
Sun?
a. A
b. B
c. C
d. D
9. According to Figure 25-1, the Sun has an absolute
magnitude of ____.
a. –5
b. 0
c. 5
d. 5000
10. A Hertzsprung-Russell (H-R) diagram shows the relationship between ____.
a. absolute magnitude and apparent magnitude
b. temperature and absolute magnitude
c. parallax and temperature
d. apparent magnitude and parallax
11. The source of the Sun’s energy is ____.
a. chemical burning
b. nuclear fusion
12. What determines the final stages of a star’s life cycle?
a. size
b. color
c. temperature
c. nuclear fission
d. magnitude
13. After the red giant phase, the next phase for a medium mass star is:
a. nova
b. planetary nebula
c. white dwarf
14. This is how bright a star appears on Earth.
a. apparent magnitude
b. absolute magnitude
d. photosynthesis
c. magnitude
d. black dwarf
d. luminosity
15. Another name for the interstellar matter that will eventually form a star is ______.
a. red giant
b. nebula
c. supernova
d. black hole
Astronomy Practice Quiz 3: Stars
1. The source of the Sun’s energy is ____.
a. chemical burning
b. nuclear division
Name: _________________
c. nuclear fusion
2. About 90 percent of stars on the H-R diagram are ____.
a. supergiants b. main-sequence stars c. white dwarfs
3. All stars, regardless of size, eventually ____.
a. turn into black dwarfs
b. explode
d. photosynthesis
d. black holes
c. run out of fuel and collapse
4. The Sun is a ____.
a. black hole
b. black dwarf c. main-sequence star
d. become black holes
d. red giant
5. Massive stars terminate in a brilliant explosion called a ____.
a. red giant
b. protostar
c. neutron star d. supernova
6. What is the next stage in the Sun’s life cycle?
a. white dwarf b. red giant
c. planetary nebula
d. black dwarf
7. According to Figure 25-1, which main-sequence stars
are brightest?
a. the smallest
b. the coolest
c. the hottest
d. none of the above
8. In the H-R diagram above, which letter represents the
Sun?
a. A
b. B
c. C
d. D
9. According to Figure 25-1, the Sun has an absolute
magnitude of ____.
a. –5
b. 0
c. 5
d. 5000
10. A Hertzsprung-Russell (H-R) diagram shows the relationship between ____.
a. absolute magnitude and apparent magnitude
b. temperature and absolute magnitude
c. parallax and temperature
d. apparent magnitude and parallax
11. The source of the Sun’s energy is ____.
a. chemical burning
b. nuclear fusion
12. What determines the final stages of a star’s life cycle?
a. size
b. color
c. temperature
c. nuclear fission
d. magnitude
13. After the red giant phase, the next phase for a medium mass star is:
a. nova
b. planetary nebula
c. white dwarf
14. This is how bright a star appears on Earth.
a. apparent magnitude
b. absolute magnitude
d. photosynthesis
c. magnitude
d. black dwarf
d. luminosity
15. Another name for the interstellar matter that will eventually form a star is ______.
a. red giant
b. nebula
c. supernova
d. black hole