Polar Ice Caps Are Found on

Q13: The Oort Cloud, which lies outside the

Q20: Comet tails<br>A)are longest near the sun.<br>B)are shortest

Q23: Comets consist of<br>A)leftover matter from the early

Q24: The planets are visible because<br>A)their atmospheres are

Q32: Traces of life are being sought on

Q42: The least dense of the following planets

Q44: The planet having a period of rotation

Q45: Of the following planets, the one with

Q50: A planet that consists largely of compressed

Q53: The largest known meteorite has a mass