Plate Tectonics and Earth Layers

Front

What is plate tectonics?

Back

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

Front

What are the three main types of plate boundaries?

Back

Divergent, convergent, and transform boundaries.

Front

What occurs at divergent boundaries?

Back

Tectonic plates move away from each other, leading to the formation of new crust, often seen at mid-ocean ridges.

Front

What is a convergent boundary?

Back

A boundary where two tectonic plates collide, often resulting in mountain formation or subduction.

Front

What is subduction?

Back

The process where one tectonic plate moves under another and sinks into the mantle.

Front

What is the lithosphere?

Back

The rigid outer layer of the Earth, consisting of the crust and the upper mantle.

Front

What is the asthenosphere?

Back

The semi-fluid layer of the mantle beneath the lithosphere that allows tectonic plates to move.

Front

What is continental drift?

Back

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

Front

What evidence supports the theory of continental drift?

Back

Similar fossils found on different continents, geological formations, and the fit of continental coastlines.

Front

What is the inner core of the Earth?

Back

The innermost layer of the Earth, composed of solid iron and nickel.