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- 1. Multiple Choice
Characteristics used to classify stars include:
distance, size, and color.
size, distance, and brightness.
color, brightness, and distance.
size, brightness, and temperature.
- 2. Multiple Choice
The Hertzsprung-Russell diagram shows that main-sequence stars:
are mostly hot and dim.
are mostly cool and bright.
increase in brightness as they increase in temperature.
decrease in brightness as they increase in temperature.
- 3. Multiple Choice
A star is born when:
a nebula expands
helium and oxygen combine
nuclear fusion starts
a protostar begins to cool
- 4. Multiple Choice
A supernova is the explosion of a dying:
medium-mass star
high-mass star
protostar
low-mass star
- 5. Multiple Choice
What color are the coolest stars?
blue-white
yellow
red
orange
- 6. Multiple Choice
The absolute brightness of a star depends on its:
distance and temperature
size and temperature
color and temperature
distance and color
- 7. Multiple Choice
The Milky Way galaxy is an example of a(n)
spiral galaxy
globular cluster
elliptical galaxy
irregular galaxy
- 8. Multiple Choice
What is defined as the distance between wave crests?
Speed
Wavelength
Amplitude
Frequency
- 9. Multiple Choice
Which of the following shows all wavelengths of the electromagnetic spectrum that are used to gain
information about the components of the universe?
Radio, infrared, and visible light
Radio, infrared, Ultraviolet, and X-rays
Radio, infrared, visible light, ultraviolet, and X-rays
Radio, infrared, visible light, ultraviolet, X-rays, and gamma rays
- 10. Multiple Choice
What is a light-year?
The distance between two stars
The distance light travels in one year
The time it takes light to travel 300,000,000 meters
The time it takes light to travel to Earth from the Sun
- 11. Multiple Choice
What two characteristics of stars are shown in an H-R diagram?
Absolute brightness and apparent brightness
Size and surface temperature
Size and apparent brightness
Surface temperature and absolute brightness
- 12. Multiple Choice
Click on the image: The star Procyon B has a surface temperature of 7,500°C and a low absolute brightness. What type of star is Procyon B?
Blue supergiant
Main Sequence
Red Giant
White dwarf
- 13. Multiple Choice
At what point does a star form from a nebula?
When gravity pulls the gas and dust of the nebula together
When the density of the nebula increases
When nuclear fusion begins
When fuel runs out in the core
- 14. Multiple Choice
A star is twice as massive as the sun. How will its lifespan compare?
Its lifespan will be longer.
Its lifespan will be shorter.
Its lifespan will be the same.
There is no way to tell.
- 15. Multiple Choice
Which will the sun become when it runs out of fuel?
A black hole
A neutron star
A white dwarf
All of the above
- 16. Multiple Choice
Analyze the image of the model of the Milky Way galaxy.
At which location would you expect to find the sun?
1
2
3
4
- 17. Multiple Choice
All of the following are parts of the range of the electromagnetic spectrum except:
infrared radiation.
UV radiation
sound waves
X-rays
- 18. Multiple Choice
Earth's atmosphere blocks short wavelengths of the electromagnetic spectrum. Which telescopes must be placed in orbit around Earth in order to observe short wavelength radiation? *See image
Gamma Ray telescopes
Visible Light telescopes
Infrared telescopes
Radio telescopes
- 19. Multiple Choice
Why does Earth get more energy from the sun than from all the other stars in the universe combined?
The sun is much larger than other stars.
The sun is much hotter than other stars.
The sun is much denser than other stars.
The sun is closer than other stars.
- 20. Multiple Choice
The Milky Way galaxy is described as a disk of stars orbiting a central point on the disk. Which of these best describes why people on Earth cannot see the entire shape of the Milky Way galaxy?
Earth is a part of this galaxy.
Many more stars exist outside the galaxy.
The stars in the center of the galaxy are extremely small.
The center of the galaxy consists of a dense cluster of stars.
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