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24 Cards in this Set
- Front
- Back
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What is the Equator?
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the imaginary line that divides the earth into the Northern and Southern Hemispheres
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What is the axis?
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the is an imaginary straight line running through the earth from the north pole to the south pole
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What is the hydrosphere?
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it is all the earths water
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What is the atmosphere?
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the blanket of gases the earth is surrounded by
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What are seismic waves?
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vibrations that travel through the earth
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What it the earths crust?
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the thin solid outermost zone of the earth that is the outer covering
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what is the oceanic crust?
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the thick crust beneath the ocean
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What is the mantle?
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a zone of rock beneath the crust
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what is the lithosphere?
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the solid portion of the mantle and the crust above it
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What is the asthenosphere?
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is approx. 200 km thick
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What is plasticity?
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the ability of solid to flow
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What is the core?
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below the mantle a zone of rock
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What are S waves?
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secondary waves
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What are P waves?
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primary waves
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What is Moho?
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Mohorovicic discontinuity
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What are shadow zones?
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locations on the earths surface where neither s waves nor p waves are detected or only where p waves are detected
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What is the Magnetosphere?
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the region of space which is affected by the earth magnetic field
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What is gravity?
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the force of attraction that exists between the matter of the universe
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What is Newtons Law of Gravitation?
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States the force of attraction between any two objects depends on their masses and the distance between them. the larger the masses of two objects and the closer together thay are the greater will be the force of gravity between them
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What is weight?
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the measure of strength of pull on an object
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What is the oblate spheroid?
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a slightly flattened sphere
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What is Mass?
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mass is the amount of matter in an object
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What is the continental crust?
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the crust on which continents rest
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Who is Mohorovicic Discontinuity?
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the boundary between the crust and the mantle
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