Plate Tectonics

Front

What is Plate Tectonics?

Back

The theory that explains the structure and movement of the Earth's lithosphere, which is divided into tectonic plates that float on the semi-fluid asthenosphere.

Front

What evidence supported Wegener's theory of continental drift?

Back

Rock, fossil, and climate data.

Front

What is a Convergent Boundary?

Back

A plate boundary where two tectonic plates move toward each other, often causing one plate to be forced beneath the other.

Front

What was the name of the supercontinent that existed 200 million years ago?

Back

Pangea.

Front

What causes the movement of tectonic plates?

Back

Convection currents within the mantle, where molten material rises and falls due to density and gravity.

Front

What is a Divergent Boundary?

Back

A plate boundary where two tectonic plates move away from each other, often creating new crust as magma rises to the surface.

Front

What is a Transform Boundary?

Back

A plate boundary where two tectonic plates slide past each other horizontally, causing earthquakes.

Front

What is the significance of the shape of continents in supporting continental drift?

Back

The shapes of continents, such as how South America and Africa fit together, suggest they were once joined.

Front

What are fossils, and how do they support the theory of continental drift?

Back

Fossils of similar species found on different continents indicate that these continents were once connected.

Front

What role do convection currents play in plate tectonics?

Back

Convection currents in the mantle drive the movement of tectonic plates by transferring heat from the Earth's interior.