Glencoe Science Level Green

Chapter 7: Earth in Space

Section 3 Self-Check Quiz-Eng.

1
An astronomical unit is __________.
A)smaller than a kilometer
B)the distance between Earth and the Sun
C)equal to a light-year
D)the distance between Earth and the Moon
2
What separates inner and outer planets?
A)Saturn's rings
B)Mercury
C)Jupiter
D)the asteroid belt
3
The inner planets are composed mainly of __________.
A)rocks
B)gases
C)water
D)methane
4
Water is found on which inner planets?
A)Earth and Mercury
B)Earth and Venus
C)Earth and Mars
D)Mars and Venus
5
Which is the only outer planet that is not a gas giant?
A)Jupiter
B)Saturn
C)Neptune
D)Pluto
6
Which moon of Jupiter might contain oceans of water?
A)Io
B)Callisto
C)Europa
D)Ganymede
7
What makes Uranus and Neptune appear blue?
A)methane
B)water
C)oxygen
D)iron
8
In which direction does a comet's tail always point?
A)toward the Sun
B)behind its path
C)away from the Sun
D)upward from the orbit
9
Earth's solar system might have begun as a __________.
A)black hole
B)nebula
C)galaxy
D)comet
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