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