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