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