Plate Tectonics and Boundaries

Front

Upper mantle and crust that is broken into pieces called plates.

Back

Lithosphere

Front

Soft layer of earth that has convection currents and causes plates to move.

Back

Asthenosphere

Front

Individual who proposed the Continental Drift Theory.

Back

Alfred Wegener

Front

Large land mass or supercontinent 250 Million Years Ago.

Back

Pangaea

Front

New ocean floor is created at the ______ boundary.

Back

Divergent

Front

Boundary in which plates move apart.

Back

Divergent

Front

Boundary in which plates collide.

Back

Convergent

Front

Boundary that produces only earthquakes.

Back

Transform

Front

Boundary that produces mountains, volcanoes, and trenches.

Back

Convergent

Front

Boundary that produces rift valleys and mid-ocean ridges.

Back

Divergent