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