Igneous Rocks

Front

What is the texture of igneous rocks that cools very quickly and has no visible crystals?

Back

Glassy

Front

What is the texture of igneous rocks that cools slowly and has large, visible crystals?

Back

Phaneritic

Front

What is the texture of igneous rocks that contains gas bubbles and has a sponge-like appearance?

Back

Vesicular

Front

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

Back

Igneous rocks form when molten (melted) rock cools.

Front

What type of igneous rock is formed from lava that erupts onto the Earth's surface?

Back

Extrusive

Front

What type of igneous rock is formed from magma that cools slowly beneath the Earth's surface?

Back

Intrusive

Front

What is the texture of igneous rocks that have both large and small crystals?

Back

Porphyritic

Front

What is the term for igneous rocks that are formed from the solidification of magma?

Back

Igneous rocks.

Front

What is the difference between intrusive and extrusive igneous rocks?

Back

Intrusive rocks cool slowly underground and have large crystals; extrusive rocks cool quickly on the surface and have small or no crystals.

Front

What is an example of an extrusive igneous rock?

Back

Pumice.