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 movement of tectonic plates?

Back

Convection currents in the Asthenosphere, which are caused by the heat from the Earth's core.

Front

What is a convergent boundary?

Back

A tectonic plate boundary where two plates move toward each other, often causing mountains, earthquakes, and volcanic activity.

Front

What is a divergent boundary?

Back

A tectonic plate boundary where two plates move apart from each other, leading to the formation of new crust, such as mid-ocean ridges.

Front

What is a transform boundary?

Back

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

Front

What is subduction?

Back

The process where one tectonic plate moves under another plate and sinks into the mantle, often leading to volcanic activity.

Front

What are convection currents?

Back

The circular movement of fluids (like magma) caused by the heat from the Earth's core, driving the movement of tectonic plates.

Front

What is the lithosphere?

Back

The rigid outer layer of the Earth, consisting of the crust and the upper mantle, which is broken into tectonic plates.

Front

What is the asthenosphere?

Back

The semi-fluid layer of the mantle beneath the lithosphere, where convection currents occur, allowing tectonic plates to move.

Front

What evidence supports the theory of plate tectonics?

Back

The distribution of earthquakes and volcanoes along plate boundaries, the fit of continental coastlines, and fossil correlations across continents.