Reasoning Scientists now claim that some of the low, wide debris-covered formations first observed on radar images of Mars as far back as the 1970s are in fact glaciers around 1km thick. The large formations were first seen on both hemispheres of the planet on images sent back by NASA’s Viking orbiters. There are many similar apron-shaped formations on the Martian landscape but the latest reconnaissance images from Mars have lead some scientists to believe that the bigger rounded slopes and ridges have features which suggest they were formed by a flow of thick ice covered rubble. There are other known deposits of ice at the polar caps where temperatures are much lower. These newest discoveries are at much lower latitudes and some scientists believe that there could be enough water held in these formations to support humans in future Mars missions.

168. Some scientists claim there is now reason to believe that ice exists on Mars in locations other than just the polar caps

	(a) True
	(b) False
	(c) Cannot say
	(d)

169. NASA believes that there is perhaps enough water on Mars to support humans on future missions

	(a) True
	(b) False
	(c) Cannot say
	(d)

170. Radar technology existed prior to the 1980s

	(a) True
	(b) False
	(c) Cannot say
	(d)

TOTAL

Detailed Solution

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