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25 Cards in this Set
- Front
- Back
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crust |
the outermost layer of the earth |
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mantle |
the thick layer of rock just below Earth's crust |
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magma |
the melted rock inside Earth |
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core |
the dense center of the earth |
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convection current |
circular movement of heated materials to a cooler area |
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fault |
a crack in the earth's crust along which movement occurs |
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plate tectonics |
the study of how Earth's lithospheric plates interact |
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weathering |
the process by which rocks are gradually broken down |
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strata |
the horizontal layers of material |
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topsoil |
the upper layer of soil beneath the subsoil |
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subsoil |
the layer of soil beneath the topsoil |
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bedrock |
the solid rock layer beneath the subsoil |
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equilibrium |
a state of rest or balance |
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True or False The earth is always changing in order to maintain balance |
True |
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True or False The earth is made up of distinct layers with the same characteristics |
False |
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True or False The theory of plate tectonics helps explain major geologic catastrophes on Earth |
True |
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True or False The production and preservation of soil help sustain life on Earth |
True |
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How far would you have to dig to get to the other side of the earth? |
12,742 km or 7,917 miles |
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How thick is the earth's crust? |
5-70 km (3-34 miles) |
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How thick is the earth's mantle? |
2,785 km (1,730 miles) |
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How thick is the earth's outer core? |
2,335 km (1,450 miles) |
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How thick is the earth's inner core? |
1,216 km (755 miles) |
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How thick is the earth's lithosphere? |
100 km (62 miles) |
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True or False Weathering and erosion are the same thing. |
False |
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True or False Weathering is a fast process. |
False |
