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