1. Melted rock rises in the magma chamber under the volcano.

2. The volcano erupts. The lava quickly cools into extrusive igneous rock.

3. Winds, rains and temperatures break the rock into sand. The sand washes to the ocean floor and cements together into sedimentary rock.

4. The sedimentary rock sinks deeper. Heat and pressure changes (partially melts and bends) the rock into metamorphic rock.

5. Deeper down the rock fully melts and slowly cools. These intrusive igneous rocks have hard interlocking crystals.