Earth's Interior and Plate Tectonics (wrocco)
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15 terms
Terms | Definitions |
|---|---|
 Lithosphere | Made of the crust and the rigid mantle combined |
| Asthenosphere | the plastic-like layer below the lithosphere |
| Oceanic crust | Made of basalt, density 3.0g/cm3 |
| Continental Crust | Made of granite, density 2.7 g/cm3 |
| Convergent boundary | where two plates move together and form mountain ranges |
| Divergent boundary | where two plates move away from each other |
| P-waves | Primary waves - the fastest energy waves given off by an earthquake, can travel through solids, liquids, and gases |
| S-waves | Secondary waves - the slower moving energy waves given off by an earthquake, can travel only through solids |
| Hot Spot | an area where magma from deep within the mantle melts through the crust above it |
| Epicenter | the point on Earth's surface directly above an earthquake's focus |
| Outer Core | a liquid layer deep within Earth made primarily of iron and nickel |
| trench | a deep canyon or ditch formed at a subduction zone |
| earthquake | a sudden release of energy stored within earth's lithosphere |
| lag time | the time difference between the arrival of the p-waves and s-waves |
| origin time | the exact clock time that an earthquake occurred |
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