A) how to become an astronomer and learn to write books. B) when the next solar system will appear in the universe C) traveling comets that can change our lives D) what comets are made of and how they move and change
A) is written in the first person B) gives information about the solar system C) took place long ago D) tells how to make something
A) a flaming ball B) the sun C) a full moon D) a group of stars
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) solar wind B) shooting star C) fluorescent light bulb D) dirty snowball
A) doctors B) dentists C) astronauts D) astronomers
A) between the planets B) past the farthest planet C) around the sun D) behind the moon
A) an asteroid B) gravity C) a planet D) a coma
A) comets B) asteroids C) meteors D) boulders
A) a large rock B) a ball of frozen gases C) a star D) chunks of ice
A) gas and dust B) dust C) ice D) rocks
A) loops B) ellipses C) periods D) years
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