Igneous Rocks

Front

When crystals cool QUICKLY, they form a _______________ texture.

Back

fine-grained

Front

When crystals cool SLOWLY, they form a ______________ texture.

Back

coarse-grained

Front

Which RULE of being a mineral classifies an item as inorganic?

Back

inorganic

Front

____________ is when a mineral breaks in a jagged, irregular manner.

Back

fracture

Front

Igneous rocks that form when lava erupts or flows onto Earth's surface are called _______________ igneous rocks.

Back

extrusive igneous rocks

Front

What is the process called when molten rock cools and solidifies to form igneous rocks?

Back

crystallization

Front

What are the two main types of igneous rocks?

Back

intrusive and extrusive

Front

What is the texture of igneous rocks that cool slowly beneath the Earth's surface?

Back

coarse-grained

Front

What is the texture of igneous rocks that cool quickly on the Earth's surface?

Back

fine-grained

Front

What is the term for igneous rocks that form from magma that cools slowly underground?

Back

intrusive igneous rocks