Front

What is another name for Harry Hess's Plate Tectonic Theory?

Back

Seafloor Spreading

Front

According to Harry Hess's theory, where is new oceanic crust continuously created?

Back

At mid-ocean ridges

Front

What do scientists believe causes the Earth's plates to move?

Back

Convection currents in the mantle

Front

What is the process in Earth's mantle that scientists believe is driving the movement of the plates due to the heating and cooling of magma?

Back

Convection currents

Front

What is a molten and semi-molten rock mixture found under the surface of Earth called?

Back

Magma

Front

What was the supercontinent that included all current land masses before they split apart?

Back

Pangaea

Front

What is the theory of seafloor spreading also known as?

Back

the theory of plate tectonics.

Front

According to the Law of Superposition, which layer is the oldest? A, B, C, or D?

Back

A

Front

According to the Law of Superposition, which layer is the youngest? A, B, C, or D?

Back

A

Front

What type of crust is generally older and made mostly of granite?

Back

Continental Crust