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25 Cards in this Set
- Front
- Back
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Axis
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imaginary straight line running through the earth from pole to pole
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seismic waves
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vibration that travels through the earth
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crust
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outermost zone of the solid earth
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mantle
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zone of rock below the earth's crust
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core
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center of a planetary body, such as earth
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Moho
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the Mohorovicic discontinuity, boundary between the earth's crust and mantle
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shadow zones
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location on the earth's surface where no seismic waves or only P waves can be detected
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magnetosphere
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a region of space that is affected by the earth's magnetic field
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gravity
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force of attraction between all matter in the universe
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law of gravitation
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principle that the force of attraction between two objects depends on the masses and the distance between the objects
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equator
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an imaginary line that divides the earth into the Northern and Southern Hemispheres
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oblate spheroid
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a slightly flattened sphere
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hydrosphere
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all of the earth's water
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atmosphere
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a blanket of gases that surround the earth
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mass
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the amount of matter in an object
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oceanic crust
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the crust of the earth beneath the oceans
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continental crust
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the part of the crust on which the continents rest
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lithosphere
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the uppermost part of the mantle
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asthenosphere
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the part right below the lithosphere
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plasticity
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the ability of a solid to flow
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P waves
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primary waves
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S waves
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secondary waves
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Mohorovicic dicontinuity
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the boundary bwtween the crust and the mantle
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weight
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a measure of the strength of the pull of gravity on an object
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newtons
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the unit that weight is measured in
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