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Earth as a Planet (Why the Earth is NOT flat (All other planets, stars are…
Earth as a Planet
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Magnetic Field
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If we didn't have it, compasses wouldn't work
If we didn't have it, we wouldn't have the ozone layer
Earth's Rotation
Revolves around sun, Heliocentric Model
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Rotates at 17,000 km/s at equator, and nearly zero at poles
Rotates on axis once every 24 hours, a day
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Waves
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P-Wave: first wave to detect, can travel through, solids, liquids and gases
S-Wave: second to detect, can travel through solids
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