Earth Sciences 2240F/G Lecture 10: Earth science 10
20 Jan 2018
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Document Summary
Chapter 10: the physics and chemistry of water and air. Thus, the quantity of volatile or potentially volatile material in the whole earth is assumed not to have changed since the earliest times, except for loss of hydrogen and helium. Venus: solar energy increased and more co2 entered the atmosphere increasing atmospheric pressure and evaporating the water, the atmosphere became so thick radiation couldn"t reflect back into space; the greenhouse got stronger and atmosphere got thicker. Mars: still is surface and subsurface ice, proximity to asteroid belt left it exposed to a higher flux of meteorite impact than earth, thus gradual erosion of atmosphere, atmosphere is thin, surface temps change dramatically during a day. Density[mass/volume: depends on temp, pressure and water vapor air"s density is lowest, at a high elevation, on a hot day, when the atmospheric pressure is low. The air"s density is highest: at low elevations, when temperature is low, and when pressure is high.
