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Unit 2 Test Review
Unit 2 Test Review
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6th Grade Earth Science chapter on the Universe
Flashcards
18 cards
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Practice quiz
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Questions
18
Answers
1
Which star would be the hottest?
Vega, Blue-white
Wolf, red
Ceti, yellow
Cygni B, orange
2
What is the difference between terrestrial planets and gas giants?
Gas giants have rocky crusts.
Terrestrial planets have thinner atmospheres.
Gas giants are denser.
Terrestrial planets are larger.
3
What do scientists need to calculate the absolute magnitude of a star?
distance and color
color and temperature
color and composition
distance and apparent magnitude
4
Which two objects are located the farthest apart?
Earth and Polaris
Earth and the Sun
Earth and Mars
Milky Way and Andromeda galaxies
5
How long would it take light from a star 5 ly away to reach Earth?
3 years
5 months
3 months
5 years
6
Why do the Sun and Moon appear to be the same size from Earth?
The Moon is hotter.
The Sun is hotter.
The Moon is closer.
The Sun is closer
7
What refers to the actual brightness of a star?
apparent magnitude and absolute magnitude
size and luminosity
absolute magnitude and luminosity
apparent magnitude and luminosity
8
What kind of scientist would work at a planetarium?
meteorologist
chemist
astronomer
biologist
9
What is a characteristic of a good scientific theory?
It becomes a law.
It changes with new observations from scientists.
It never changes.
It is the idea of just one scientist.
10
What is the composition of a terrestrial planet?
liquid
gaseous
soft
rocky
11
What unit is used to measure the size of stars?
solar radius
astronomical unit
light-year
kilometers
12
What is the largest object in our solar system?
Jupiter
Sun
Moon
Earth
13
Which is the correct order for stars from hot to cold?
blue, white, yellow, red
red, yellow, white blue
yellow, white, blue, red
blue, white, yellow, orange
14
Two stars have the same apparent magnitude. Star A is 300 ly and star B is 30 ly away.
Stars A and B have the same absolute magnitude.
Star B is larger than Star A.
Star B has a greater absolute magnitude.
Star A has a greater absolute magnitude.
15
What keeps the stars in the galaxy from moving away from each other?
gravity
density
convection
temperature
16
For main sequence stars, as absolute magnitude increases, so does . . .
distance
apparent magnitude
density
surface temperature
17
What is star luminosity?
brightness
temperature
size
distance
18
What space journey would take the longest?
Earth to the Moon
Earth to Uranus
Earth to a star in Orion's belt.
Earth to the Sun
