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