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15 terms

Earth's Interior and Plate Tectonics (wrocco)

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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