Fourth graders identify rock types by observing key characteristics.

Explore the differences between minerals and rocks.

Did you know the rock cycle is a continuous cycle that takes hundreds of millions of years? This webpage explains how sedimentary, metamorphic, and igneous rocks are formed. It also gives examples of each type of rock. Also includes a...

Classify rocks and minerals according to their characteristics.

Welcome to Devil's Tower National Park in Wyoming! This highly interactive website reveals the geological processes behind the formation of this unique natural structure.