1 A) water B) methane C) rocks D) gases 2 A) the shape of the Sun B) the rotation of Earth C) the orbit of the Moon D) the orbit around the Sun 3 A) Earth, Sun, Moon B) Moon, Earth, Sun C) Sun, Moon, Earth D) Moon, Sun, Earth 4 A) craters B) oceans C) maria D) surface features 5 A) equal to a light-year B) the distance between Earth and the Sun C) smaller than a kilometer D) the distance between Earth and the Moon 6 A) Jupiter B) Pluto C) Saturn D) Neptune 7 A) Callisto B) Io C) Europa D) Ganymede 8 A) perfectly spherical B) flat C) almost spherical D) varying 9 A) orbit B) rotation C) spin D) revolution 10 A) solstice B) eclipse C) equinox D) tropic 11 A) waning B) eclipsing C) crescent D) waxing 12 A) from the orbit of another planet B) material ejected from Earth's mantle and crust C) material ejected from the sun D) the asteroid belt 13 A) upward from the orbit B) away from the Sun C) behind its path D) toward the Sun 14 A) comet B) black hole C) nebula D) galaxy 15 A) Sun, Earth, Moon B) Sun, Moon, Earth C) Earth, Sun, Moon D) Earth, Moon, Sun 16 A) The Sun reaches an equal distance between the north and south poles. B) The Sun is directly over the north or south pole. C) The Sun reaches its greatest distance north or south from the equator. D) The Sun is directly over the equator. 17 A) by examining Earth B) by looking through a telescope C) by watching other moons form D) by examining Moon rocks 18 A) Earth and Mars B) Earth and Venus C) Earth and Mercury D) Mars and Venus 19 A) the distance from the Earth to the Sun B) the orbit of the Moon around the Sun C) the position of the Moon D) the tilt of Earth's axis 20 A) Jupiter B) Saturn's rings C) Mercury D) the asteroid belt
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