Term
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Definition
| rock formed when chemical reactions cement sediments together, hardening them |
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Term
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Definition
| rock that behaves something like a liquid and a solid |
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Term
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Definition
| the boundary between two sections of rock that move relative to one another |
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Term
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Definition
| the point on the surface of the earth directly above an earthquake's focus |
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Term
scientists often separate the earth into five distinct sections.
Mame those sections: |
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Definition
atmosphere
hydrosphere
crust
mantle
core |
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Term
| What tow regions of the earth does the Moho discontinuity separate? |
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Definition
| Moho separates crust from mantle |
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Term
| What is the main thing scientists observe in order to learn about the makeup of the earth's interior? |
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Definition
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Term
| What causes the magnetic field of the earth? |
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Definition
| a large amount of electrical flow in teh core |
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Term
| What makes the rapid-decay theory more scientifically valid than the dynamo theory? |
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Definition
| It has been used to accurately predict the magnetic fields of other planets |
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Term
| Why would life cease to exist without the earth's magnetic field? |
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Definition
| cosmic rays from the sun would hit earth |
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Term
| what are the "plates" in plate tectonics? |
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Definition
| they are large islands of the earth's lithosphere |
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Term
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Definition
| it is a supercontinent that might have existed in earth's past |
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Term
| Name the four kinds of mountains and what is required for the formation of each: |
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Definition
- volcanic
- domed
- fault block
- folded
- volcanic and domed require magma from the mantle
- fault block mountains need vertical motion along a fault.
- folded mountains need rock masses pushing against each other.
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