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24 Cards in this Set
- Front
- Back
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equator
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an imaginary line that divides the earth into north and south hemispheres
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oblate spheroid
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a slightly flattend sphere
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axis
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an imaginary line running through the earth from pole to pole
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hydrosphere
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all the earth's water
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atmosphere
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gases around the earth
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seismic waves
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vibrations that travel through the earth
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crust
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outer most zone of the earth
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mass
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amount of matter in the earth
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oceanic crust
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the crust beneath the oceans
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continental crust
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the crust in which the continents rest on
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mantle
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a zone of rock below the earth's crust
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lithosphere
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the solid portion of the mantle and the crust above it
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asthenosphere
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region of the mantle just below the lithosphere
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plasticity
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the ability of a solid to flow
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Core
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center of the earth
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P waves / compression waves
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primary waves
can travel through liquids, solids, and gases travel faster than S waves |
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S waves / shear waves
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secondary waves
travel through only solids slower than P waves |
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Moho
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boundary between the earth's crust and mantle
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shadow zone
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location on the earth's surface where no seismic waves or P waves can be found; or only P waves
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magnetosphere
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the region of space, which is affected by 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 gravity between two objects depends on their mass and distance apart
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weight
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the measure of the strength of the pull of gravity on an object
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newtons
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what we mesure wieght in
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