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