Plate tectonics
Terms
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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