Front

What generates heat within Earth's core?

Back

Radioactive decay.

Front

What type of event occurs at a tectonic boundary?

Back

Earthquake.

Front

What is the process called when one tectonic plate is forced under another?

Back

Subduction.

Front

What happens at a divergent boundary?

Back

Plates pull apart.

Front

Why was Alfred Wegener's idea of continental drift rejected?

Back

He could not identify the force that moved the continents.

Front

What are the three main layers of the Earth?

Back

Crust, mantle, and core.

Front

What is the outermost layer of the Earth called?

Back

Crust.

Front

What is the mantle primarily made of?

Back

Semi-solid rock that flows slowly.

Front

What is the core of the Earth composed of?

Back

Iron and nickel.

Front

What geological feature is formed at a convergent boundary?

Back

Mountains or volcanoes.