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15 Cards in this Set

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divergent boundary
a place where the plates that make up Earth's crust and upper mantle move away from one another
core
the innermost layer of Earth, which consists of a molten outer part and a solid inner part
Pangaea
a super continent that existed 200 million years ago
crust
the thin, outer layer of Earth
seismograph
an instrument that records the intensity, duration, and nature of earthquake waves
continental drift
the slow movement of Earth's landmasses riding on plates
theory
an idea or group of ideas explaining facts
mantle
a thick layer of rock between the crust and the core of Earth
focus
the point, or place at which an earthquake begins
earthquake
shaking or movement of Earth's surface, caused by the release of stored energy along a fault
lithosphere
the solid, rocky layer of Earth, including the crust and top part of the mantle.
plate tectonics
a theory that Earth's crust is divided into distinct,moving plates
asthenosphere
the layer of Earth below the lithosphere; the upper part of the mantle
convergent boundary
place where the plates that make up the Earth's crust move together
Moho
dividing line between the Earth's crust and the mantle