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