Igneous Rocks

Front

What are igneous rocks?

Back

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

Front

What is the difference between magma and lava?

Back

Magma is molten rock beneath the Earth's surface, while lava is molten rock that has erupted onto the Earth's surface.

Front

What are intrusive igneous rocks?

Back

Intrusive igneous rocks are formed from magma that cools and solidifies beneath the Earth's surface.

Front

What are extrusive igneous rocks?

Back

Extrusive igneous rocks are formed from lava that cools and solidifies on the Earth's surface.

Front

What is the texture of coarse-grained igneous rocks?

Back

Coarse-grained igneous rocks have large crystals due to slow cooling of magma.

Front

What is the texture of fine-grained igneous rocks?

Back

Fine-grained igneous rocks have small crystals due to rapid cooling of lava.

Front

Give an example of an intrusive igneous rock.

Back

Diorite 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

How do the cooling rates of magma and lava affect crystal size?

Back

Slow cooling of magma allows large crystals to form, while rapid cooling of lava results in small crystals.

Front

What is the significance of the location where igneous rocks form?

Back

The location affects whether the rock is classified as intrusive (beneath the surface) or extrusive (on the surface).