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24 Cards in this Set
- Front
- Back
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Axis
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the imaginary straight line running through the earth from pole to pole
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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 make up
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Atmosphere
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a blanket of gas
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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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the solid most outermost zone of the earth's mass
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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 ocean
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Continental Crust
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the crust on which the continents rest on
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Mantle
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a zone of rock nearly 2,870 km thick; makes up 2/3 of the earth's mass, divided into two regions
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Lithosphere
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a rigid layer; 65 km to 100 km thick
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Asthenosphere
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below the lithosphere; approximately 200 km thick
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Plasticity
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enormous heat and pressure; the solid rock of the asthenosphere has the ability to flow
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Core
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the center of the earth mostly made of iron
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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 Zone
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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
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P Waves
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primary seismic waves
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S Waves
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secondary seismic waves
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Magnetosphere
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the space in which the space is affected by the earth's magnetic field
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Gravity
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the force of the attraction that exists between all matter and the universe
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Law of Gravitation
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states that the force of attraction between any two objects depends upon their masses and distance between them
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Weight
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a measure of strength of the pull of gravity on an object
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Newtons
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the measurement of weight
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