Igneous Rocks

Front

What is molten rock above the ground called?

Back

Lava

Front

What type of rock is formed from cooled lava or magma?

Back

Igneous rock

Front

What type of igneous rock is formed above the Earth's surface?

Back

Extrusive rock

Front

What size of grains do extrusive igneous rocks have?

Back

Small

Front

What size of grains do intrusive igneous rocks have?

Back

Large

Front

What is the process called when magma cools and solidifies?

Back

Crystallization

Front

What are the two main types of igneous rocks?

Back

Intrusive and extrusive rocks

Front

Where do intrusive igneous rocks form?

Back

Below the Earth's surface

Front

What is the main difference between intrusive and extrusive igneous rocks?

Back

Intrusive rocks cool slowly underground, while extrusive rocks cool quickly on the surface.

Front

Give an example of an extrusive igneous rock.

Back

Basalt