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