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26 Cards in this Set
- Front
- Back
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Seismic Waves
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-vibrations that travel through through the earth
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Mantle
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-zone of rock nearly 2,870 km an is divided into two different regions
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oblate spheroid
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-slightly flattened sphere
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axis
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-an imaginary straight line running through the earth from the North Pole to the South Pole
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hydrosphere
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-all earths water
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lithosphere
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-a rigid layer 65 km to 100 km thick
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crust
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-the thin solid outermost zone of the earth is the outer covering
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asthenosphere
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-a region just below the lithosphere; approximately 200 km
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plasticity
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-ability of solid to flow
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core
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-forms center of earth; mostly made of iron
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S waves
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-secondary waves; travel only through solids
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P waves
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-primary waves; faster the S
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Mohorovicic discontinuity
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- the boundary between the crust and mantle
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Shadow Zones
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-locations on the earths surface where neither S waves or P waves are detected or where only P waves are detected
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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 gravity
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- states that the force of attraction between any two objects depends upon their masses and the distance between them
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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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- what weight is measured in
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revolution
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-the movement of the earth around the sun
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rotation
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- the spinning motion of the earth: that as it rotates around the the sun it also spins on its axis
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Moho
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- also known as mohorovicic discommunity
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continental crust
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- the crust in which the continents rest on; varies from 32km to 70 km thick
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oceanic crust
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- the crust beneath the ocean; only 5 km to 10 km thick
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mass
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-amount of matter in an object
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mass
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-amount of matter in an object
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