Chapter 5 Flashcard

Front

What are basaltic rocks?

Back

Basaltic rocks are dark-colored igneous rocks with a lower silica content, also known as mafic rocks.

Front

What is the texture of a rock?

Back

Texture refers to the size, shape, and distribution of the crystals or grains that make up a rock.

Front

What type of grain do intrusive igneous rocks have?

Back

Intrusive igneous rocks have a coarse grain.

Front

What is the most common extrusive igneous rock?

Back

The most common extrusive igneous rock is basalt.

Front

What is lava?

Back

Lava is magma that flows out onto Earth's surface.

Front

What are granitic rocks?

Back

Granitic rocks are light-colored igneous rocks with a high silica content, also known as felsic rocks.

Front

What is the difference between magma and lava?

Back

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

Front

What is an example of an extrusive igneous rock?

Back

Pumice is an example of an extrusive igneous rock.

Front

What does the term 'mafic' refer to?

Back

Mafic refers to igneous rocks that are rich in magnesium and iron, typically dark in color.

Front

What is the significance of crystal size in igneous rocks?

Back

The size of crystals in igneous rocks indicates the rate of cooling; slower cooling results in larger crystals.