Summary Ch 21, 22 Terrestrials

Summary Ch 21, 22 Terrestrials - Chapter Summary Chapters...

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Chapter Summary Chapters 21, 22: Terrestrial Planets 1. Comparative Planetology (read text and ppt for details) craters impact cratering volcanoes volcanism (lava, outgassing) cliffs --------\ mountains -------- tectonics plains --------/ ice caps magnetic field rotation axis tilt effect of distance from the Sun heating/cooling of interior erosion (water, ice, wind, debris) Core: Highest density; nickel and iron Mantle: Moderate density; silicon, oxygen, etc. Crust : Lowest density; granite, basalt, etc. lithosphere: the relatively rigid outer layer of a planet that encompasses the crust and the uppermost portion of the mantle. 2. Differentiation: Gravity pulls high-density material to center Lower-density material rises to surface Material ends up separated by density 3. Heating of Interior early: accretion & differentiation today: radioactive decay 4. Cooling of Interior Convection transports heat as hot material rises and cool material falls
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Summary Ch 21, 22 Terrestrials - Chapter Summary Chapters...

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