A) traveling comets that can change our lives B) when the next solar system will appear in the universe C) what comets are made of and how they move and change D) how to become an astronomer and learn to write books.
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 group of stars B) a flaming ball C) the sun D) a full moon
A) Earthquakes and floods occurred after a comet appeared. B) Comets appeared in the sky suddenly. C) People did not understand comets. D) Bad things always happened after a comet appeared.
A) dirty snowball B) fluorescent light bulb C) solar wind D) shooting star
A) astronomers B) dentists C) doctors D) astronauts
A) behind the moon B) around the sun C) between the planets D) past the farthest planet
A) a planet B) a coma C) an asteroid D) gravity
A) meteors B) comets C) boulders D) asteroids
A) a ball of frozen gases B) a large rock C) a star 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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