Igneous Rocks

Front

What are igneous rocks?

Back

Igneous rocks are formed from the cooling and solidification of molten rock (magma or lava).

Front

What are the two main types of igneous rocks?

Back

The two main types of igneous rocks are extrusive and intrusive.

Front

What is an extrusive igneous rock?

Back

An extrusive igneous rock is formed from lava that cools quickly on the Earth's surface.

Front

What is an intrusive igneous rock?

Back

An intrusive igneous rock is formed from magma that cools slowly beneath the Earth's surface.

Front

Give an example of an extrusive igneous rock.

Back

Rhyolite is an example of an extrusive igneous rock.

Front

Give an example of an intrusive igneous rock.

Back

Granite is an example of an intrusive igneous rock.

Front

What is the texture of extrusive igneous rocks?

Back

Extrusive igneous rocks typically have a fine-grained texture due to rapid cooling.

Front

What is the texture of intrusive igneous rocks?

Back

Intrusive igneous rocks usually have a coarse-grained texture because they cool slowly.

Front

What is the main characteristic of igneous rocks?

Back

Igneous rocks are hard and dense.

Front

What is the process of forming igneous rocks called?

Back

The process of forming igneous rocks is called crystallization.