7th HMH Unit 2 L3&4 Vocab

Front

Outermost solid layer of Earth

Back

crust

Front

Located between the core and crust

Back

Mantle

Front

Movement of matter due to density differences from temperature variations.

Back

Convection

Front

Extends from below the mantle to Earth's center

Back

core

Front

Outermost, rigid layer of Earth

Back

lithosphere

Front

Layer of soft mantle rock that flows slowly

Back

asthenosphere

Front

Strong lower part of the mantle

Back

mesosphere

Front

245 million years ago, continents were a single landmass.

Back

Pangaea

Front

Process explaining age and magnetic patterns of sea-floor rocks

Back

sea-floor spreading

Front

Large-scale movements of Earth’s lithosphere, including the crust and upper mantle.

Back

plate tectonics