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13 Cards in this Set
- Front
- Back
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What percent of the earth's math does the crust make up? |
1% |
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What is the crust made up of? |
Hard, solid rock |
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What percent of the earth's mass does the mantle make up? |
80% |
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Why can we make an inference about the mantles consistency? |
Earthquakes and volcanoes |
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Why is the core solid? |
The pressure is so great it forces the atoms together. |
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How many layers does the core have? |
2 |
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What is the core mainly made of? |
Iron and Nickel |
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What is the lithosphere? |
The plates at the top of the mantle/bottom of the crust |
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How thick is the lithosphere? |
100 km or 60 miles |
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How fast do plate tectonics move every year? |
1-10 cm per year |
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What exactly are plate tectonics? |
Theory describing the movement of the plates |
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What is subduction? |
Continental plates sinking into the mantle and dragging the oceanic crust with it |
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What geographic features are found at subduction zones? |
Ocean trenches, mountains, and volcanoes |
