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 causes the Earth's magnetic field?

Back

The movement of molten metals within the Earth's outer core.

Front

Which two continents did Alfred Wegener believe looked like puzzle pieces?

Back

South America and Africa.

Front

What are convection currents?

Back

The circular movement of fluids (like the mantle) caused by differences in temperature and density.

Front

True or False: The mantle flows due to convection currents.

Back

True.

Front

What geologic feature forms at a hot spot?

Back

Volcano.

Front

What evidence did Wegener use to support his continental drift hypothesis?

Back

Fossils, rock formations, and the continental puzzle effect.

Front

What is a tectonic plate?

Back

A large, rigid piece of the Earth's lithosphere that moves and interacts with other plates.

Front

What happens at a divergent boundary?

Back

Tectonic plates move apart, leading to the formation of new crust, often seen at mid-ocean ridges.

Front

What is a convergent boundary?

Back

A tectonic boundary where two plates collide, often forming mountains or causing subduction.