A fun way to learn the 3 rock types, how they're formed and how they fit into the overall rock cycle. ... More information on igneous rocks. Igneous rocks are the "new kids" in the rock cycle.

The three types of rocks above can each form one another by melting or erosion and subsequent lithification. This process helps to bring nutrients from deep in Earth's mantle to the surface.

Zoom in. To teach kids about the three different kinds of rocks—igneous, sedimentary, and metamorphic—U.S. Forest Service geologist Kevin L. Johnson suggests looking closer at the finds with a ...

There are three types of rocks — igneous, sedimentary, and metamorphic — that have formed over time in the Earth's different layers. A rock can begin as one type and can change many times.