A) what comets are made of and how they move and change B) traveling comets that can change our lives C) how to become an astronomer and learn to write books. D) when the next solar system will appear in the universe
A) tells how to make something B) is written in the first person C) took place long ago D) gives information about the solar system
A) a full moon B) a flaming ball C) the sun D) a group of stars
A) Bad things always happened after a comet appeared. B) Comets appeared in the sky suddenly. C) Earthquakes and floods occurred 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) astronauts D) dentists
A) past the farthest planet B) behind the moon C) around the sun D) between the planets
A) a planet B) gravity C) a coma D) an asteroid
A) boulders B) meteors C) comets D) asteroids
A) a ball of frozen gases B) a large rock C) a star D) chunks of ice
A) ice B) gas and dust C) dust D) rocks
A) ellipses B) years C) periods D) loops
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