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1.
Name: ________________
Inner & Outer Planet Review Questions
Of the planets in our solar system, which planet (or former planet) is in a group of its own?
A. Pluto
B. Earth
C. Saturn
D. Uranus
2.
What keeps Mercury from being pulled to a fiery death by the sun’s gravity?
A. its hot temperatures
B. its lack of atmosphere
C. its size in comparison to Earth
D. its speed as it orbits around the sun
3.
Which of the inner planets’ surface looks most like Earth’s moon?
A. Mars
B. Earth
C. Venus
D. Mercury
4.
On Venus, the sun rises in the ______.
A. East
B. West
C. North
D. South
5.
What is the brightest light in Earth’s night sky?
A. Sun
B. Moon
C. Venus
D. Mercury
6.
Even though Earth receives less than one billionth of the sun’s heat and light, the planet is able to
stay warm because of the ______.
A. Force of gravity
B. Greenhouse effect
C. Process of erosion
D. Tilt of Earth’s axis
7.
After Earth, what planet would most likely be able to support life?
A. Mars
B. Venus
C. Uranus
D. Mercury
8.
Olympus Mons, the largest volcano in the solar system, is located on what planet?
A. Mars
B. Earth
C. Venus
D. Mercury
9.
The gas giants include all of the following EXCEPT ______.
A. Saturn
B. Jupiter
C. Mercury
D. Neptune
10. Our solar system formed from a space cloud of gas and dust known as a ______.
A. Nebula
B. Black hole
C. Supernova
D. Stellar wind
11. During the formation of our solar system, what pushed gases outwards to form the gas giant
planets that exist today?
A. Gravity
B. Density
C. Heat and particles from the sun
D. Heat and particles from a supernova
12. What planet is famous for the Great Red Spot, a gigantic hurricane that covers an area more than
twice the size of Earth?
A. Mars
B. Pluto
C. Saturn
D. Jupiter
13. Jupiter rotates more rapidly on its axis than Earth.
A. True
B. False
14. All the outer planets of our solar system—the “gas giants”- orbit the sun much more quickly than
the inner planets.
A. True
B. False
15. What planet is the least dense of all the gas giants?
A. Saturn
B. Venus
C. Jupiter
D. Uranus
16. As Uranus approaches Neptune, it speeds up. Scientists say Uranus’ orbit is ______ by Neptune.
A. Ruined
B. Slowed
C. Cancelled
D. Perturbed
17. What planet appears to lie on its side at a 98* angle?
A. Venus
B. Jupiter
C. Uranus
D. Mercury
18. What planet (or former planet) is in a group of its own because it is small, has no atmosphere, and
consists of a rock and ice surface?
A. Pluto
B. Venus
C. Mercury
D. Neptune