- 1. What is a cloud of dust and gas in outer space where stars are formed called?
A) a black hole
B) nebula
C) neutron star
D) supernova
- 2. What is a dense body of gas and dust collapsing inward because of gravity called?
A) nebula
B) a black hole
C) protostar
D) neutron star
- 3. What is the continuous and distinctive band of stars called that is based on their color and brightness?
A) a black hole
B) nebula
C) main sequence star
D) protostar
- 4. What is a star that has undergone gravitational collapse and is about the size of the earth called?
A) protostar
B) main sequence star
C) nebula
D) white dwarf star
- 5. What is a a large cool star with low surface temp and large diameter called?
A) white dwarf star
B) protostar
C) red giant star
D) main sequence star
- 6. What is a hot central star surrounded by expanding gas called?
A) red giant star
B) white dwarf star
C) main sequence star
D) planetary nebula
- 7. What is a star with a brightness 1000s of times brighter than the sun called?
A) planetary nebula
B) supergiant star
C) red giant star
D) white dwarf star
- 8. What is a star that explodes and becomes very luminous called?
A) supergiant star
B) planetary nebula
C) red giant star
D) supernova
- 9. What is a stellar remnant resulting from the collapse of a massive star called?
A) supergiant star
B) planetary nebula
C) supernova
D) neutron star
- 10. This object is formed when a supernova explodes and its core collapses.
A) a black hole
B) supergiant star
C) neutron star
D) supernova
- 11. The hottest star's color is ____.
A) red
B) orange
C) blue
D) yellow
- 12. The amount of light received on earth from a star is called its ____.
A) actual brightness
B) temperature
C) light wavelength
D) apparent brightness
- 13. How hot and large a star is in relation to other stars is called its ____.
A) apparent brightness
B) actual brightness
C) cosmic radiation
D) light wavelength
- 14. A star's brightness is the same thing as its ____.
A) magnitude
B) temperature
C) radiation
D) color
- 15. The Hertzsprung-Russell Diagram compares a star's ____ and ____.
A) temperature, color
B) color, distance
C) distance, size
D) brightness, temperature
- 16. One light year is ____.
A) the distance from the sun to the edge of our solar system
B) the distance light can travel in one year
C) the distance from the earth to the sun
D) the distance from the sun to the nearest star
- 17. Our sun is considered to be a ____ mass star.
A) main
B) high
C) medium
D) low
- 18. A low mass star will live more than ____ billion years.
A) 30
B) 10
C) 15
D) 0.5
- 19. White dwarfs are very hot stars that have ____ absolute magnitudes.
A) high
B) no
C) low
D) pulsating
- 20. Before a star can become a main sequence star, it must have been a ____.
A) white dwarf
B) protostar
C) red giant
D) planetary nebula
- 21. In the Hertzsprung-Russell Diagram, white dwarfs and red giants lie ____ the main sequence.
A) within
B) on the main sequence
C) outside
D) in between
- 22. The dimmest stars visible without a telescope are ____ magnitude stars.
A) three-fourths
B) sixth
C) tenth
D) first
- 23. The brightness of most stars ____ as the star's surface temperature increases.
A) is inversely proportional
B) increases
C) does not change
D) decreases
- 24. Very small, hot blue or white stars are called ____ dwarfs.
A) white
B) brown
C) blue
D) black
- 25. At the end of its life cycle, a very large star may become a ____.
A) planet or asteroid
B) neutron star or pulsar
C) white or black dwarf
D) giant or supergiant
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