Front

What type of rock is formed by smaller pieces of rock that settled at the bottom of a lake?

Back

Sedimentary rock.

Front

How are metamorphic rocks formed?

Back

Heat and pressure cause buried rock to change into new rock.

Front

What are the three groups of rocks classified by?

Back

How they form.

Front

How are sedimentary rocks formed?

Back

By compacting and cementation.

Front

What is the rock cycle?

Back

The process of rocks changing into different types of rocks.

Front

What is an igneous rock?

Back

A rock formed from cooled molten rock (magma or lava).

Front

What is a metamorphic rock?

Back

A rock that has changed from one type to another due to heat and pressure.

Front

What is sedimentation?

Back

The process of settling and accumulating sediment to form sedimentary rocks.

Front

What is erosion?

Back

The process by which rocks and soil are worn away and transported by natural forces.

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.