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