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 flaming ball C) the sun D) a full moon
A) Comets appeared in the sky suddenly. B) Earthquakes and floods occurred after a comet appeared. C) People did not understand comets. D) Bad things always happened after a comet appeared.
A) fluorescent light bulb B) dirty snowball C) solar wind D) shooting star
A) doctors B) astronauts C) astronomers D) dentists
A) between the planets B) behind the moon C) past the farthest planet D) around the sun
A) a coma B) a planet C) an asteroid D) gravity
A) asteroids B) meteors C) comets D) boulders
A) a large rock B) chunks of ice C) a star D) a ball of frozen gases
A) dust B) gas and dust C) ice D) rocks
A) loops B) ellipses C) periods D) years
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