Air Motion - Note: magnetic poles are NOT aligned with the...

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Air Motion Two causes: 1. convection (hot air rises, cool air settles) 2. rotation of Earth (coriolis effect) . . . . bends path of air   combining thses produces cells   Storms also arise from these effects
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air flows away from high pressure and toward low pressure (hurricanes and tornadoes are Low pressure) Magnetic Field [Demo: bar magnet and iron filings] - see Figure 5.16 in text  [Link to Figure 5.16]  (Fig.  4.17 in 2nd ed.)   rotation axis and magnetic axis are separated by about 11.5 degrees   To have a magnetic field, planet needs:
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1. liquid layer inside . .... (carries charge) 2. rotation of the planet 1. faster rotation => stronger magnetic field Since Earth has a magnetic field, and rotates, it must have a liquid region inside
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Unformatted text preview: Note: magnetic poles are NOT aligned with the rotation axis magnetic poles move o N pole moved about 800 km toward the rotation axis in last 150 years magnetic poles flip o sometimes S magnetic pole is on "top" o poles typically stay for about 10,000 - 100,000 years o evidence from alignment in rocks OPTIONAL MATERIAL: magnetic field traps charged particles from the Sun Figure 5.19 in the book also shows the Van Allen radiation belts. [Link to Figure 5.19] (Fig. 4.20 in 2nd ed.) Aurora (northern lights) come from charge particles interactng with atmosphere...
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This note was uploaded on 03/09/2012 for the course AST 1002 taught by Professor Emilyhoward during the Spring '10 term at Broward College.

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Air Motion - Note: magnetic poles are NOT aligned with the...

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