4 layers and crust components
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| crust | the thin, outer layer of Earth is called its crust
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| mantle | a very thick layer of Earth found under the crust
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| inner core | the center of the Earth which is very hot and solid. It is 1,250 km thick.
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| outer core | the layer of theEarth made of very hot liquid iron and nickel. It is 2,200 km thick.
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| lithosphere | consists of the crust and the upper part of the mantle
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| asthenosphere | the lower part of the Earth's mantle and consists of partially molten rock
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| tectonic plates | approximately 12 plates that make up the surface of the Earth and are always moving
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| convection currents | hot mantle material rises to the top, cools & drops down again creating a continuous circular motion
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| seismic waves | shock waves in solid rock generated by earthquakes or underground explosions
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| continental crust | the part of the crust that includes continents
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| oceanic crust | the crust that includes the ocean floors
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| convergent boundary | a tectonic (plate) boundary where two plates are moving toward each other.
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| divergent boundary | a tectonic (plate) boundary where two plates are moving away from each other
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| transform boundary | a tectonic boundary when two plates grind past each other as they move in opposite directions
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| sea floor spreading | the process n which liquid rock rises and becomes solid as two tectonic plates move farther apart
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| med ocean ridge | a series of mountain ranges on the ocean floor
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| Pangea | a "super continent" that existed 200 million years ago that broke apart and moved to form the seven continents that exist today.
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| subduction | one edge of a plate is forced below another
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| continental drift | the movement and re-formation of continents resulting from the movement of plates
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Created by:
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