Earth Science: Astronomy, Book J

Section 3: The Outer Planets

Self-Check Quiz-Eng.

1.
Scientists theorize that Jupiter's core is __________.
A)rocky
B)made of hydrogen and helium
C)made of ammonia and methane
D)made of water vapor
2.
The Great Red Spot on Jupiter is __________.
A)an ocean of liquid hydrogen
B)a mountain range
C)a tremendous storm
D)a volcano
3.
How many known moons orbit Jupiter?
A)16
B)10
C)7
D)17
4.
Which of Jupiter's four largest moons is the most volcanically active?
A)Europa
B)Ganymede
C)Io
D)Callisto
5.
Which of Jupiter's four largest moon's oceans do scientists hope to explore in the near future?
A)Io
B)Ganymede
C)Callisto
D)Europa
6.
What do scientists think is the cause of Uranus's tilted orbit?
A)It's a result of its distance from the Sun.
B)The temperatures out in space caused the planet to tilt.
C)It collided with another object in space.
D)It was created that way.
7.
How can Saturn be the second largest planet, as well as the lowest in density?
A)It is composed mostly of hydrogen and helium
B)It is made of a large, rocky core.
C)It is made mostly of water vapor.
D)It is composed mostly of methane and ammonia
8.
Why isn't Neptune always the eighth planet from the Sun?
A)because it sometimes passes outside Pluto's orbit to become the ninth planet
B)because all the planet's change positions occasionally
C)because it sometimes passes inside Uranus's orbit, becoming the seventh planet from the Sun
D)because sometimes we are unable to see Neptune's orbit in space
9.
How many moons does Pluto have?
A)two
B)none
C)one
D)three
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