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| 1 | |
What term is used to refer to Mercury, Venus, Earth, and Mars? |
| | A) | solar systems |
| | B) | galaxies |
| | C) | gas giants |
| | D) | terrestrial planets |
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| 2 | |
Which of the following are characteristics of outer planets? |
| | A) | solid surface, presence of rings, numerous moons |
| | B) | no solid surface, presence of rings, numerous moons |
| | C) | no solid surface, presence of rings, no moons |
| | D) | solid surface, small size, very few moons |
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| 3 | |
Which of the following gases are found in the atmosphere surrounding Saturn? |
| | A) | nitrogen and oxygen |
| | B) | carbon dioxide and oxygen |
| | C) | oxygen and helium |
| | D) | hydrogen and helium |
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| 4 | |
Which celestial objects are found in the area between the orbits of Mars and Jupiter? |
| | A) | dwarf planets and comets |
| | B) | only comets |
| | C) | asteroids and dwarf planets |
| | D) | only asteroids |
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| 5 | |
What is a comet? |
| | A) | a loosely-held-together mass of rock and ice chunks from the outer parts of the solar system |
| | B) | a gassy giant that orbits the Sun |
| | C) | a rocky object found only between the orbits of Mars and Jupiter |
| | D) | moons that orbit Saturn |
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| 6 | |
What kind of celestial object is Pluto? |
| | A) | a planet |
| | B) | an asteroid |
| | C) | a dwarf planet |
| | D) | a comet |
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| 7 | |
How many years does it take Halley’s comet to orbit Earth? |
| | A) | 16 |
| | B) | 76 |
| | C) | 220 |
| | D) | 5 000 000 000 |
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