Unit 3 Vocab- 8th

Front

Thin, solid outer layer of Earth above the mantle.

Back

Crust

Front

Layer between Earth's crust and core

Back

mantle

Front

Central part of Earth below the mantle

Back

core

Front

Solid outer layer of Earth: crust + rigid upper mantle

Back

lithosphere

Front

Soft mantle layer where tectonic plates move

Back

asthenosphere

Front

Strong lower mantle between asthenosphere and outer core

Back

mesosphere

Front

A wave of energy traveling through Earth from an earthquake in all directions.

Back

Seismic wave

Front

Hypothesis of a large landmass breaking into smaller continents that drifted to current locations.

Back

continental drift

Front

Theory that Earth's outer layer consists of large, moving pieces called tectonic plates.

Back

plate tectonics

Front

Process of new oceanic lithosphere formation at mid-ocean ridges as magma rises and solidifies, while older seafloor moves away.

Back

sea-floor spreading