Plate Tectonics Vocab Intro

Front

Continental Drift

Back

Continents were once connected in one large landmass and slowly moved to their current positions.

Front

Tectonic plate

Back

moves around on the asthenosphere

Front

Seafloor spreading

Back

formation of new seafloor

Front

Lithosphere

Back

Rigid layer of the Earth

Front

Plate tectonics

Back

Theory that Earth's crust and upper mantle are broken into plates moving on the asthenosphere.

Front

asthenosphere

Back

plastic layer of the Earth

Front

Pangaea

Back

large ancient landmass

Front

Convection current

Back

Heat transfer driving plate tectonics.

Front

Magnetic reversal

Back

Change in Earth's magnetic field

Front

Continental drift

Back

Alfred Wegener proposed