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18 Cards in this Set
- Front
- Back
Crust |
The thin outermost layer of Earth. |
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Lithosphere |
The solid rocky layer of Earth formed by the crust and upper part of the mantle. |
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Mantle |
The thick layer of dense rock that sits beneath Earth’s crust. |
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Sea-floor Spreading |
The pulling apart of plate boundaries under the ocean floor. |
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Tectonic Plates |
An irregular section of the lithosphere that floats on Earth’s mantle. |
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Epicenter |
A point on Earth’s surface directly above the location of initial plate boundary movement during an earthquake.
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Focus |
The location where earthquake movement first occurs.
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Plate Boundary
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The edge of a tectonic plate.
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Seismic Wave
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A wave that carries the energy released when rock moves at plate boundaries.
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Tsunami
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A huge ocean wave usually caused by earthquakes under the ocean floor.
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Fossil |
The preserved remains or traces of an organism that lived in the distant past. |
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Strata |
Horizontal layers of sediment. |
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Convergent Boundaries |
Form when plates are coming together. |
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Divergent Boundaries |
Form when plates move in different directions. |
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Transform Fault Boundaries |
Form when plates slide past each other. |
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P Waves |
Travel the fastest (primary waves). |
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S Waves |
Cause the ground to shake from side to side (secondary waves). |
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L Waves |
Travel across the Earth’s surface in a rolling, wave-like fashion, most destructive (surface waves). |