1. Which of the following describes the terrestrial planets?
a. large, gaseous
b. small, rocky
c. short days, cold
d. massive, low density
e. multiple moons

b. small, rocky

2. This planet similar to Earth in size, density, and mass, is shrouded in a thick cloud cover.
a. Venus
b. Uranus
c. Mars
d. Mercury
e. Pluto

a. Venus

3. Although the carbon-dioxide-rich atmosphere of this red planet is only 1 percent as dense as that of Earth, extensive dust storms may be responsible for color changes.
a. Mercury
b. Venus
c. Mars
d. Jupiter
e. Uranus

c. Mars

4. Until the recent discovery that Jupiter, Uranus, and Neptune also have these features, this phenomenon was thought to be unique to Saturn.
a. moons
b. spots
c. craters
d. rings
e. bands

d. rings

5. On which of the following bodies in our solar system has volcanic activity been observed?
a. Triton
b. Venus
c. Mars
d. Europa
e. Neptune

a. Triton

6. The ____________ explains how our solar system probably formed from a giant cloud of gases and dispersed solid particles.
a. protogalactic theory
b. nebular hypothesis
c. extrastellar solar hypothesis
d. planetary compression theory

b. nebular hypothesis

7. Which one of the following statements is believed to be true of comets?
a. They have highly elliptical orbits around the Sun
b. They are composed mostly of dense rock particles
c. They may gain slightly in mass with each orbit around the Sun
d. Their bright, glowing appearance in the night sky is due to frictional heating in Earth's atmosphere

a. They have highly elliptical orbits around the Sun

8. ____________ refers to the bright head of a comet.
a. Lima
b. Toma
c. Coma
d. Lira

c. Coma

9. ____________, a moon orbiting Jupiter, has an unusually smooth, uncratered, ice-covered surface.
a. Phobos
b. Titan
c. Miranda
d. Europa
e. Ganamead

d. Europa

10. The largest known volcano in the solar system is ____________.
a. Mauna Loa, Hawaii, on Earth
b. Vulcan on Venus
c. Solfatara on Jupiter
d. Olympus Mons on Mars
e. Sapas Mons on Venus

d. Olympus Mons on Mars

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