Igneous Rocks

Front

What is an igneous rock?

Back

Igneous rocks are formed from the cooling and solidification of magma or lava.

Front

What are the two main types of igneous rocks?

Back

Intrusive and extrusive rocks.

Front

What is the difference between intrusive and extrusive igneous rocks?

Back

Intrusive rocks form below the Earth's surface, while extrusive rocks form above the surface.

Front

Give an example of an intrusive igneous rock.

Back

Granite is an example of an intrusive igneous rock.

Front

Give an example of an extrusive igneous rock.

Back

Basalt is an example of an extrusive igneous rock.

Front

What is obsidian?

Back

Obsidian is a type of extrusive igneous rock that forms from rapidly cooled lava.

Front

How does the cooling rate affect the texture of igneous rocks?

Back

Slow cooling allows large crystals to form, resulting in coarse-grained texture; fast cooling results in fine-grained texture.

Front

What is magma?

Back

Magma is molten rock located beneath the Earth's surface.

Front

What is lava?

Back

Lava is molten rock that reaches the Earth's surface.

Front

What type of igneous rock is formed from volcanic activity?

Back

Extrusive igneous rocks are formed from volcanic activity.