Types of Rocks

Front

What is a rock?

Back

A naturally occurring solid mixture of one or more minerals that may also include organic matter.

Front

What type of rock is formed from cooled lava?

Back

Igneous rock.

Front

What type of rock has fast cooling magma resulting in small or no crystals?

Back

Extrusive igneous rock.

Front

What process changes all types of rocks into sediment?

Back

Weathering and erosion.

Front

What type of rock is made of tiny fragments of other rocks?

Back

Sedimentary rock.

Front

What is the rock cycle?

Back

The continuous process of rock formation, breakdown, and reformation.

Front

What type of rock is formed under heat and pressure?

Back

Metamorphic rock.

Front

What is an example of an igneous rock?

Back

Obsidian or rhyolite.

Front

What is sediment?

Back

Small pieces of rock and organic material that can be carried by wind or water.

Front

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

Back

Intrusive rocks cool slowly underground, while extrusive rocks cool quickly on the surface.