Earth Sciences 1086F/G Study Guide - Galilean Moons, Impact Crater, Equatorial Ridge
6 Feb 2013
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Document Summary
Possible internal layer of liquid water beneath outer layer of ice. Only planetary satellite known to have a magnetic field. N. b. heat from gravitational energy and radioactive decay important. Bombarded by energy particles because orbit is within jupiter"s radiation. Appears to have continents and oceans (large continent called xanadu) Thought to be the source of the tenuous e-ring around saturn. Albedo resembles that of fresh snow or ice. Fountains of icy salt water and snow spew from troughs at the south pole. Dark material has flooded the floors of some craters. One mountain which rises at least 20 km above the surface. Most craters small (small debris remaining after formation) Melting period in which craters were flooded by water. Network of faults suggest at least one episode of tectonics. Bright crater floor may indicate possible clean ice in some regions. Glaciers perhaps formed by water + ammonia (lower melting point)
