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