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Unformatted text preview: MANTLE AND CRUST o (anorthosite 4.6) light minerals that float to the top and form the crust -3.9: LARGE IMPACTS FORM MARE BASINS (lunar breccias 3.9)-3.8-3.2: BASALT ERUPS IN BASINS (age of lunar basalts)-3.2 present: LITTLE ACTIVITY Mercury-Temperature : +427 C to -173 C o Hot, close to the sun o Not the hottest planet, b/c has no atmosphere o Radiational cooling o Most difference in daytime high/nighttime low -Same size as moon, looks like moon , similar to the moon Venus-Earths sister planet (in size)-Carbon dioxide atmosphere, 90 X the Earths-+ 480 Chottest planet o Can melt metal on its surface Mars-Thin atmosphere, mostly CO2, enormous ancient volcanoes, evidence of wind and water-MOST earth-like planet, in terms of surface conditions...
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- Spring '07