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18 Cards in this Set
- Front
- Back
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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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crust |
The thinner and outer most layer of the Earth |
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lithosphere |
The solid rocky layer of earth formed by the crust and the upper part of the mantle |
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mantle |
The thick layer of dense rock that sits beneath the Earth’s crust. |
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sea-floor spreading |
The pulling of plate boundaries under the ocean plates |
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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 the earthquake |
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Focus |
The location where an earth quakes first occurs |
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Plate Boundry |
The edge of a tectonic plate |
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Seismic Wave |
A wave that carries the energy released when rock move at plate boundaries |
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Tsunami |
A huge ocean wave usually caused by earthquakes under the ocean floor |
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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) |
