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24 Cards in this Set
- Front
- Back
equator
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an imaginary line that divides the earth into the Northern and Southern Hemipheres
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oblate spheroid
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a slightly flattened sphere
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axis
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imaginary straight line running through the earth from pole to pole
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hydrosphere
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all of earth's water
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atmosphere
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the blanket of gases surrounding 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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thin, solid, outermost zone of the earth
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mass
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amount of matter in an object
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oceanic crust
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crust under the ocean
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continental crust
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parts of the crust where continents rest on
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mantle
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a zone of rock nearly 2,870 km thick
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lithosphere
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a rigid layer 65km to 70 km; solid portion of the mantle and the crust above it
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asthenosphere
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just below the lithosphere
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plasticity
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the ability of a rock to flow
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core
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below the mantle
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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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Moho
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the change in waves between the crust and mantle
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shadow zones
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lacations on earth's surface where only P waves are located and where the S and P waves aren't.
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magnetosphere
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region of space which is affected by earth's magnetic feild
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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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one of Newton's Laws that states that the force of attraction between any two objects depends apon their masses and distance between them
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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 (N)
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weight is measured in this
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