2024 Igneous

Front

What are mafic rocks?

Back

Mafic rocks are dark in color due to their high iron and magnesium content.

Front

What happens to mineral crystals when magma cools slowly?

Back

The mineral crystals form larger, not smaller.

Front

Where are extrusive rocks formed?

Back

Extrusive rocks are formed above the surface of a volcano.

Front

What are all igneous rocks formed from?

Back

All igneous rocks are formed from magma and lava.

Front

What does low silica content in lava indicate?

Back

Low silica content in lava results in darker-colored rock.

Front

What is the difference between intrusive and extrusive igneous rocks?

Back

Intrusive rocks form from magma that cools slowly underground, while extrusive rocks form from lava that cools quickly on the surface.

Front

What is the primary component of magma?

Back

The primary component of magma is molten rock, which includes minerals, gases, and crystals.

Front

What is the texture of igneous rocks that cool quickly?

Back

Igneous rocks that cool quickly have a fine-grained texture.

Front

What is the significance of silica content in igneous rocks?

Back

Silica content affects the color, viscosity, and type of igneous rock formed.

Front

What are volcanic gases?

Back

Volcanic gases are gases emitted from a volcano, including water vapor, carbon dioxide, and sulfur dioxide.