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17 Cards in this Set
- Front
- Back
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Oceanic crust
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5-10 km, dense, basalt
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Continental crust
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32-70, less dense, granite
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Crust
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1% of earth's mass, 30 km
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Mantle
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66% of earth's mass, ONLY LAYER THAT IS LIQUID, 2900km
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Core
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33% of earth's mass, SOLID,5200km
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Oblate sphere
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The earth is actually aan oblate sphere, rather than a perfect sphere
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Hydrosphere
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71% of the earth is covered by water, 97% of that is salt water, and the remaining 3% is fresh
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Atmosphere
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78% nitrogen,21% oxygen, and 1% percent other
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Lithosphere
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65-100 km thick, solid
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Asthenosphere
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200km thick, dense, solid, not rigid, flows under pressure-platicity
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Seismic waves
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vibrations that travel through the earth, some causes are explosions, earthquakes, and meteorite impacts
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P waves
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P waves travel through liquids, solids, and gases, P wave is faster than the S wave
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S waves
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S waves only travel through solids
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Shadow zones
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areas where neither S waves or P waves are detected, or where only P waves are detected
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Magnetosphere
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The region of space that is affected by the earth's magnetic field
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gravity
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The force of attraction that exists between all matter in the universe
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Law of Gravitation
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The force of attraction between any two objects depends on their mass and distance
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