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10 Cards in this Set
- Front
- Back
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What is the Crust? |
A thin outer layer of solid rock |
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What is the Lithosphere? Properties?
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Includes crust and upper part of mantle.
Made up of tectonic plates Relatively cold and rigid |
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What is the mantle?
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Near the crust = rigid
Deeper = flow slowly and less rigid and temp. increases |
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What is the core?
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Inner core = solid
Outer core = liquid |
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What does radioactive decay cause in the mantle?
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Convection currents which causes plates to move
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What are tectonic plates?
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Float on mantle
Move 2.5cm per year Volcanoes and earthquakes often occur where plates meet |
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What are used to study the structure of the Earth?
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Seismic waves
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What are seismic waves used for?
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To study the structure of the earth
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How are seismic waves used to study the earth?
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Measuring the time takes for waves to travel through earth and where they're detected.
P–waves = through liquid and solid S–waves = only in solids |
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What causes seismic waves?
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Earthquakes or man made explosions on earth's surface
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