Igneous Rock Flashcard

Front

What process do igneous rocks form by?

Back

Crystallization.

Front

What characteristic do igneous rocks have if they form with lots of space and over a long period of time?

Back

They will have larger crystals.

Front

What is the name of an igneous rock that partially forms inside the Earth then abruptly erupts?

Back

Porphyry.

Front

What are all igneous rocks formed from?

Back

Magma and lava.

Front

How are igneous rocks classified?

Back

By mineral composition and texture.

Front

What is magma?

Back

Magma is molten rock located beneath the Earth's surface.

Front

What is lava?

Back

Lava is molten rock that reaches the Earth's surface.

Front

What is the difference between intrusive and extrusive igneous rocks?

Back

Intrusive rocks form inside the Earth, while extrusive rocks form on the surface.

Front

What is an example of an extrusive igneous rock?

Back

Obsidian.

Front

What is an example of an intrusive igneous rock?

Back

Granite.