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24 Cards in this Set
- Front
- Back
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Seismic Waves
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vibrations that travel through the 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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below the mantle and center of the Earth mostly made up of iron
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Moho
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hange in the speed of waves marks the boundary between the crust and the mantle
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shadow zones
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locations on the Earth's surface where neither S waves nor P waves are detected or where only P waves are detected. THIS OCCURS BECAUSE THE MATERIALS THAT MAKE UP THE EARTH'S INTERIOR ARE NOT UNIFORM IN RIGIDITY
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magnetosphere
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a region of space which 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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this law states that the force between any two objects dpends upon their masses and the distance between them
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weight
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a measure of the strenght of gravity on an object
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oceanic crust
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beneath the oceans
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continental crust
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part of crust in which the continents rest on
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lithosphere
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a solid portion of the matle and the crust
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asthenosphere
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a region of 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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P waves
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primary waves- travels faster then S waves
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S waves
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secondary waves- only travels through solid materials
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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 the earth's water
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atmosphere
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blanket of gases that surroundes the earth
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newtons
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weight is measured in
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axis
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an imaginary line that runs straight through the earth from the North Pole to the South Pole
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crust
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a thin, solid, outermost zone of the earth
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mass
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the amount of matter in an object
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