Understanding Earth's Tectonic Movements

Front

What is the theory of 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 supports the theory of plate tectonics?

Back

Matching coastlines, fossil distribution, and geological similarities across continents.

Front

What are the three main types of tectonic plate boundaries?

Back

Convergent, divergent, and transform boundaries.

Front

What occurs at a convergent boundary?

Back

Two tectonic plates move towards each other, often causing one plate to be forced beneath the other, leading to mountain formation or subduction.

Front

What occurs at a divergent boundary?

Back

Two tectonic plates move apart, allowing magma to rise and create new crust, often forming mid-ocean ridges.

Front

What occurs at a transform boundary?

Back

Two tectonic plates slide past each other horizontally, which can cause earthquakes.

Front

What is a supercontinent?

Back

A large landmass that is made up of multiple continents that were once joined together, such as Pangaea.

Front

What is the main force that drives the movement of tectonic plates?

Back

Gravity, along with convection currents in the mantle.

Front

What causes earthquakes at transform boundaries?

Back

Pressure build-up and release as plates slide past each other.

Front

What is subduction?

Back

The process where one tectonic plate is forced under another, often leading to volcanic activity.