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