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- 1. Multiple Choice
Which of the following units is used to express the size of stars?
kilometer
light-year
solar radius
astronomical unit
- 2. Multiple Choice
The table compiles information about the distance of various stars from Earth, their apparent magnitude, and their absolute magnitude. Based on evidence in the table, which of the stars would look the brightest when observed from Earth?
Sirius
Rigel
Arcturus
Aldebaran
- 3. Multiple Choice
Which statement best describes stars?
large planets that are composed mostly of gases
celestial bodies made up of gas that give off light
faint dots of light that can be seen from Earth's surface
objects that form in the outer parts of the solar system
- 4. Multiple Choice
Two stars have the same apparent magnitude as seen from Earth’s surface. Star A is 33 ly away. Star B is 346 ly away. Which of the following claims is supported by the evidence?
Star B is larger than Star A
Star B is more luminous than Star A
The stars have the same absolute magnitude
Star A has a smaller absolute magnitude
- 5. Multiple Choice
Which of the following statements best describes a binary star system?
A star appears blue in the night sky
A star is orbited by a gas giant planet
Two pairs of stars orbit each other
Two stars orbit each other
- 6. Multiple Choice
the brightness of a star as seen or appears from Earth
apparent magnitude
luminosity
absolute magnitude
light year
- 7. Multiple Choice
How bright a star would be if at a standard distance
apparent magnitude
absolute magnitude
light year
binary star
- 8. Multiple Choice
the true brightness of an object
luminosity
apparent magnitude
solar radii
parallax
- 9. Multiple Choice
When talking about apparent magnitude, what kind of stars have positive (larger) numbers?
Faint stars
Bright stars
- 10. Multiple Choice
A negative number on the apparent magnitude scale refers to a ...?
dimmer star
brighter star
- 11. Multiple Choice
Which two terms refer to how bright a star ACTUALLY is?
absolute magnitude and luminosity
apparent magnitude and luminosity
size and luminosity
apparent magnitude and absolute magnitude
- 12. Multiple Choice
As the temperature of a star rises, it
glows brighter
becomes dimmer
turns from blue to red
- 13. Multiple Choice
What color are stars with the highest surface temperature?
blue
white
yellow
red
- 14. Multiple Choice
What do astronomers use to describe the size of other stars?
the size of the sun
the size of the Earth
the distance from the Sun to the Earth
the distance from the Sun to the closest star
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