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) gives information about the solar system D) is written in the first person
A) a flaming ball B) the sun C) a group of stars D) a full moon
A) People did not understand comets. B) Comets appeared in the sky suddenly. C) Bad things always happened after a comet appeared. D) Earthquakes and floods occurred after a comet appeared.
A) dirty snowball B) shooting star C) fluorescent light bulb D) solar wind
A) doctors B) astronauts C) astronomers D) dentists
A) around the sun B) between the planets C) past the farthest planet D) behind the moon
A) gravity B) a coma C) an asteroid D) a planet
A) boulders B) comets C) asteroids D) meteors
A) a large rock B) chunks of ice C) a ball of frozen gases D) a star
A) rocks B) gas and dust C) dust D) ice
A) years B) ellipses C) loops D) periods
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