Igneous Rocks

Front

What type of igneous rock is formed above the Earth's surface?

Back

Extrusive rock

Front

What size of grains or particles do extrusive igneous rocks have?

Back

Small

Front

What type of igneous rock is granite, based on its large grains?

Back

Intrusive rock

Front

What group of rock does obsidian belong to?

Back

Extrusive rock

Front

What type of igneous rock is formed below the Earth's surface?

Back

Intrusive rock

Front

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

Back

Crystallization

Front

What is the main difference between intrusive and extrusive igneous rocks?

Back

Intrusive rocks form below the surface, while extrusive rocks form above 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

Front

How do the cooling rates of magma affect the size of mineral grains in igneous rocks?

Back

Slower cooling allows for larger grains, while rapid cooling results in smaller grains.