Astronomy 10 10.9.06 - o Hints that Venuss rocks are basalt...

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Astronomy 10 Plate Tectonics 10.9.06 Tectonics are the process of solid surfaces o Must have enough heat to heat the interior and must be cool enough to not melt the surface Only way you can have tectonics and Volcanism Moon Dust: o Clingy as wet beach sand even though it is dry because there isn’t air to move the particles around o The spherical clumps of dirt are the rocks that had melted, and by the time they fell to the Moon they were rounded o The rest of the clumps of dirt are jagged, which is why they interlock and stick Moon Rocks: o Found a Rock called genesis that is about 3 billion years old Mars Exploration: o Looks like a red desert o Looks rusty because it is rust (covered in a coat of Iron oxide) o Dirt is also as clingy as wet beach sand o Some of the dust does get blown around and creates dunes Generally the same character as Earth dunes The sand in sand dunes originates from beach sand o Dust is much finer then Earth dust Venus Exploration: o One American probe made it and several Soviet probes made it
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Unformatted text preview: o Hints that Venuss rocks are basalt rocks Rocky Planets (including the Moon): o All have high land and low land rocks o Rocks that are above the water and mainly granite rock and the rock below the water are mainly basalt rock o Plates are constantly moving Atlantic is getting bigger by an inch each year Moon high/low land rocks: o High land rocks are lighter then low land rocks (can see pattern on the Moon) o High land rocks is about 100s of millions of years older then the low land rock Can tell the difference because of the amount of cratering Cratering stopped in out solar system about 3.5 billion years ago Tectonics: o Plates moving over molten rock o Can see scarps to indicate movement of plates o Stress fracture occur when there has been stress in two different directions o Europas dark ice is a little bit younger then the white ice because the dark ice indicates plate tectonics...
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This note was uploaded on 04/01/2008 for the course ASTRO 10 taught by Professor Norm during the Fall '06 term at University of California, Berkeley.

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