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