Lecture11 - Lecture #11: Earth: Geology and Interior...

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1 • Overview of Earth's basic properties. Overview of Earth's basic properties. •E a r t h ' s Earth's Interior and Surface: Interior and Surface: – Composition and Structure. Composition and Structure. Lecture #11: Earth: Geology and Interior Astro 102/104 1 – Surface Surface Geologic Processes. Geologic Processes. – Evolution Evolution of the Surface. of the Surface. • Reading: Reading: – Chapters 9.1, 9.2, 9.6. Chapters 9.1, 9.2, 9.6. The Main Point Earth is a rocky planet with a differentiated it i t t d d i ft h t i Astro 102/104 2 interior structure and a dynamic surface that is impact, and erosional processes. Basic Properties of the Earth Basic Properties of the Earth Average Distance from Sun: 1.5 x 10 11 m = 150 million km = 1 A.U. Period of Rotation around Sun: 365.25 days = 1 year. Period of Spin (wrt stars): 23 hours, 56 minutes, 4 sec = ~1 day. Mass = 5.98 x 10 24 kg = 1 M E . Radius = 6378 km = 1 R 3 Radius = 6378 km = 1 R E . Density = 5.5 g/cm 3 . Escape Velocity = 11.2 km/sec (~ 25,000 mph) = v E . Atmospheric Pressure = 10 5 N/m 2 = 1 bar = P E . Most of surface covered by liquid water.
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This note was uploaded on 03/04/2008 for the course ASTRO 1102 taught by Professor Squyres,s/margot,j during the Spring '07 term at Cornell University (Engineering School).

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Lecture11 - Lecture #11: Earth: Geology and Interior...

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