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24 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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crust
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outermost zone of solid earth
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mantle
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zone of rock below the earth's surface
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core
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center of planetary body, such as the 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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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 on the masses and the distance between the objects
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equator
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the equator is an imaginary line that divides the earth into the Northern and Southern hemisphere
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oblate spheroid
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a slightly flattened sphere
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hydrosphere
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all the earth's water
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atmosphere
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a blanket of gases
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seismic waves
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vibration that travels through 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 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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solid portion of the mantle and the crust above it
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asthensphere
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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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travel through liquids, solids, and gases
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S Waves
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travel only through solids
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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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weight
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measure of strength of the pull of gravity on an object
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newtons
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weight is measured by newtons
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