Plate Tectonics

Front

What is the theory of plate tectonics?

Back

The geological theory that states that pieces of Earth's plates are in constant, slow motion, driven by convection currents.

Front

What evidence did Wegener NOT use to support his theory of continental drift?

Back

Weather and climate.

Front

What type of boundary occurs when two tectonic plates collide?

Back

Convergent boundary.

Front

What is a divergent boundary?

Back

A boundary where two tectonic plates move away from each other.

Front

What is a transform boundary?

Back

A boundary where two tectonic plates slide past each other.

Front

What is continental drift?

Back

The theory that continents have moved over geological time and were once joined together.

Front

What is the asthenosphere?

Back

The semi-fluid layer of the mantle on which tectonic plates float.

Front

What is sea floor spreading?

Back

The process by which new oceanic crust is formed at mid-ocean ridges and older crust is pushed away.

Front

What is the role of the Earth's core in plate tectonics?

Back

The core provides heat that drives convection currents in the mantle, causing tectonic plates to move.

Front

What are tectonic plates?

Back

Large pieces of Earth's lithosphere that move and interact at their boundaries.