Question

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choose the letter that best answers the question or
completes the statement.

1. which of these planets is not a terrestrial planet?

a. earth b. mercury
c. venus d. uranus

1. what theory describes the formation of the solar

system from a huge cloud of dust and gases?
a. protoplanet theory
b. nebular theory
c. planetesimal theory
d. solar theory

1. which of the following is not a characteristic of

jovian planets?
a. large size
b. composed mostly of gases and ice
c. lack of moons
d. located beyond the orbit of mars

1. which planet was explored by the rovers spirit

and opportunity?
a. mercury b. pluto
c. mars d. venus

1. which two planets are most alike?

a. jupiter and pluto
b. earth and mercury
c. mars and uranus
d. uranus and saturn

1. which of the following is not true of jupiter?

a. it is more massive than all the other planets
and moons combined.
b. it has huge rotating storms.
c. it has a thin ring system.
d. it has a solid surface.

1. which moon is known to have active volcanism?

a. io b. phobos
c. europa d. titan

1. what bodies in the solar system orbit between

mars and jupiter?
a. comets
b. stars
c. asteroids
d. meteorites

Explanation:

1. Terrestrial planets are Earth - like (rocky). Uranus is a gas giant.
2. The nebular theory states the solar system formed from a nebula (cloud of dust and gas).
3. Jovian planets (gas giants) have many moons.
4. Spirit and Opportunity rovers explored Mars.
5. Uranus and Saturn are both gas giants.
6. Jupiter is a gas planet, no solid surface.
7. Io has active volcanism.
8. Asteroids orbit between Mars and Jupiter.

Answer:

1. d. Uranus
2. b. nebular theory
3. c. lack of moons
4. c. Mars
5. d. Uranus and Saturn
6. d. It has a solid surface.
7. a. Io
8. c. asteroids