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5
|
The earth's __________ blocks cosmic rays from the sun.
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6
|
used to classify earthquakes based on their strength
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9
|
igneous or sedimentary rock that has been changed into a new kind of rock as a result of great pressure and temperature.
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10
|
____________ in the core causes the earth's magnetic field.
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11
|
rock formed when chemical reactions cement sediments together, hardening them.
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12
|
the point on the surface of the earth directly above an earthquake's focus
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13
|
In a region of the earth that has a lot of ___________, you would expect to find volcanic mountains and domed mountains.
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16
|
less-powerful earthquakes that follow many powerful earthquakes
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18
|
Many scientists think that at one time, all the continents might have fit together to form a ________ called Pangaea.
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19
|
hot, liquid rock underneath the earth's crust. When it cools, the result is igneous rock.
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20
|
rock that behaves like something between a liquid and a solid.
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