A) traveling comets that can change our lives B) when the next solar system will appear in the universe C) how to become an astronomer and learn to write books. D) what comets are made of and how they move and change
A) took place long ago B) tells how to make something C) is written in the first person D) gives information about the solar system
A) a flaming ball B) a group of stars C) the sun D) a full moon
A) People did not understand comets. B) Earthquakes and floods occurred after a comet appeared. C) Bad things always happened after a comet appeared. D) Comets appeared in the sky suddenly.
A) fluorescent light bulb B) shooting star C) dirty snowball D) solar wind
A) dentists B) astronauts C) doctors D) astronomers
A) around the sun B) behind the moon C) between the planets D) past the farthest planet
A) a coma B) a planet C) an asteroid D) gravity
A) boulders B) comets C) asteroids D) meteors
A) a ball of frozen gases B) a large rock C) chunks of ice D) a star
A) dust B) gas and dust C) rocks D) ice
A) years B) periods C) loops D) ellipses
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