Chapter 24 Review with labeling

Front

What is the shape of the Earth?

Back

The Earth is an oblate spheroid, meaning it is bigger around the equator than at the poles.

Front

What are convection currents?

Back

Convection currents are movements within a fluid caused by the fluid's temperature and density differences, which can move tectonic plates.

Front

What is Pangaea?

Back

Pangaea was a supercontinent that existed about 300 million years ago and began to break apart.

Front

How does the Earth's crust compare to an apple's skin?

Back

The Earth's crust is similar to the skin of an apple; both are the outermost layers protecting the inner parts.

Front

What is a spreading center?

Back

A spreading center is a location where two tectonic plates are moving away from each other.

Front

What is the role of tectonic plates?

Back

Tectonic plates are large sections of the Earth's crust that move and interact, causing earthquakes, volcanic activity, and the formation of mountains.

Front

What is the asthenosphere?

Back

The asthenosphere is a semi-fluid layer of the Earth's mantle that lies beneath the lithosphere and allows tectonic plates to move.

Front

What happens at a convergent boundary?

Back

At a convergent boundary, two tectonic plates collide, which can lead to the formation of mountains or subduction zones.

Front

What is the lithosphere?

Back

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

Front

What is subduction?

Back

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