igneous rocks

Front

What is the main characteristic of igneous rocks?

Back

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

Front

What are the two main types of igneous rocks?

Back

Extrusive and Intrusive igneous rocks.

Front

What is an extrusive igneous rock?

Back

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

Front

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

Back

Faster cooling results in smaller crystals (fine-grained texture), while slower cooling allows for larger crystals (coarse-grained texture).

Front

What does the color of an igneous rock indicate?

Back

The color of an igneous rock indicates its composition, particularly the silica content.

Front

What type of igneous rock is typically darker in color?

Back

Basalt is an example of a darker-colored igneous rock, which has low silica content.

Front

What type of igneous rock is typically lighter in color?

Back

Granite is an example of a lighter-colored igneous rock, which has high silica content.

Front

Where are extrusive igneous rocks commonly formed?

Back

Extrusive igneous rocks are commonly formed above the surface of a volcano.

Front

Where are intrusive igneous rocks commonly formed?

Back

Intrusive igneous rocks are commonly formed deep underground.