Comets Consist of

Q11: An eclipse of the sun can occur<br>A)

Q13: The Oort Cloud, which lies outside the

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

Q21: Polar ice caps are found on<br>A)Mercury.<br>B)Venus.<br>C)Mars.<br>D)Jupiter.

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

Q27: All known dwarf planets<br>A)are smaller than the

Q32: Traces of life are being sought on

Q42: The least dense of the following planets

Q50: A planet that consists largely of compressed

Q53: The largest known meteorite has a mass