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19 Cards in this Set
- Front
- Back
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What are the four layers of our Earth?
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Inner Core
Outer Core Mantle and crust |
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Innercore
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Made of Fe, Solid, high pressure and very hot(4300 C)
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Outer Core
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Made of Fe, Ni and S
Liquid, hot(3700 C) responsible for the Magnetosphere |
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Mantle
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Largest layer made of Fe,Mg, Si, Al,O
flows like warm plastic, convection currents set up here |
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Asthenophere
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Top part of the mantle that flows like hot Tar, the lithosphere floats here
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Lithophere
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The solid part of the earth's crust made of plates. In constant motion two types of crust, oceanic and continental
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Continental Crust
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thicker than oceanic 30-100KM thick, mostly made of granite
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Oceanic Crust
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thin dense crust mostly made of basalt
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Radiation
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The transfer of energy through space. (No Matter)
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Conduction
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The transfer of energy between materials that are touching or solids.
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Convection
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The transfer of energy in liquids and gasses causing a change in density.
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Convection Currents in Earth
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Heat from the core and the mantle is transferred towards the crust in conveyor belts.
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Outer Core Currents
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The outer core has convection currents and these cause the magnetic field.
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Alfred Wegner
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Famous scientist given credit for Continental Drift.
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What evidence did Wegener use to support his claims?
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Land Features, fossils and evidence of climate change
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What was Wegener missing from his claims that others could not understand?
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Satisfactory explanation for the force large enough to push and pull continents.
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Seafloor Spreading
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Process where new crustal rock is being laid down along the Mid-Atlantic Ridge.
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Sonar
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Device that uses sound waves of energy to map the ocean floor.
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Deep Ocean Trench
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The oceanic crust bends downward and slides into the mantle leaving a long trench on the ocean floor.
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