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The Solar System--Part 1
Test Description: Solar System review
Instructions: Answer all questions to get your test result.
1) All of the outer planets are mostly made of
A
gas and liquid around a solid core.
B
water ice.
C
metal and rock.
2) Which planet is the solar system's largest?
A
Saturn
B
Jupiter
C
Neptune
D
Uranus
3) The outer planets have atmospheres composed mostly of
A
hydrogen and helium.
B
nitrogen and oxygen.
C
water vapor and carbon dioxide.
4) All of the inner planets
A
are rocky and have a solid outer layer.
B
have thick atmospheres.
C
have at least one moon.
5) Because Mercury's mass is so small, it
A
does not rotate.
B
has a surface that is not solid.
C
has no atmosphere.
6) Why is Venus the hottest inner planet?
A
It is the closest planet to the Sun.
B
Its atmosphere traps a lot of heat energy in a process known as the greenhouse effect.
C
It is covered with liquid water.
7) Earth is the only planet with a wide variety of life because of its
A
closeness to the Sun.
B
moderate temperature and liquid water.
C
size and shape.
8) The planets in the solar system are so far apart that scientists measure the distances between them in
A
miles.
B
astronomical units.
C
kilometers.
D
astronomical meters.
9) Asteroids and comets are mainly rock and ice.
A
False
B
True
10) Which shape describes a planet's orbit?
A
an ellipse
B
a straight line
C
a circle
*select an answer for all questions
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