Chapter 9 - Plate Tectonics

Front

Plastic

Back

capable of being molded or changing shape

Front

Asthenosphere

Back

the fluid area in the upper layer of the earth's mantle, below the lithosphere, that moves in response to convection currents

Front

Continental Drift

Back

a hypothesis suggesting that continents are in constant motion on the surface of Earth

Front

Pangaea

Back

one supercontinent that all the continents were once part of

Front

Mid-ocean Ridge

Back

a mountain range in the middle of the ocean

Front

Seafloor Spreading

Back

the process by which new oceanic crust forms along a mid-ocean ridge and older oceanic crust moves away from the ridge

Front

Convection

Back

the circulation of material caused by differences in temperature and density

Front

Convergent plate boundary

Back

forms where two plates collide

Front

Divergent plate boundary

Back

forms where two tectonic plates separate

Front

Lithosphere

Back

the cold and rigid outermost rock layer of Earth