Igneous Rocks Flashcard

Front

What is an igneous rock?

Back

An igneous rock is a type of rock that forms from the solidification of molten 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 the two main types of igneous rocks?

Back

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

Front

What is an extrusive igneous rock?

Back

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

Front

What is an intrusive igneous rock?

Back

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

Front

Give an example of an extrusive igneous rock.

Back

Basalt 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

How does the cooling rate of magma affect igneous rock texture?

Back

Faster cooling results in smaller crystals, while slower cooling allows for larger crystals to form.

Front

What is the role of silica in igneous rocks?

Back

Silica content affects the viscosity of magma and influences the type of igneous rock formed.

Front

What is the texture of igneous rocks?

Back

The texture of igneous rocks refers to the size, shape, and arrangement of crystals within the rock.