SA Seafloor Spreading

Front

The oldest part of the sea floor is found near

Back

The continents

Front

The youngest part of the sea floor is found near

Back

The mid-ocean ridge

Front

This tool uses sound waves to make maps of the ocean floor

Back

SONAR

Front

These are large, underwater mountain chains where new ocean crust is formed

Back

Mid-ocean ridge

Front

Continental crust is made of this type of rock

Back

Granite

Front

Oceanic crust is made up of this type of rock

Back

Basalt

Front

Seafloor spreading is caused by

Back

Convection currents in the mantle

Front

When oceanic crust collides with continental crust, it...

Back

Subducts because oceanic crust is more dense than continental crust

Front

Oceanic crust is ____________ than continental crust

Back

Older

Front

This metal found in magma is magnetic

Back

Iron