Exploring the Rock Cycle: Petrologists at Work!

Exploring the Rock Cycle: Petrologists at Work! — page 1 — THE ROCK CYCLE WHAT IS THE ROCK CYCLE The rock cycle is a geologic process It tells how rocks are formed changed and destroyed Rocks are combinations of minerals Minerals are nonliving substances in nature There are three types of rocks Igneous rocks form when magma cools and hardens Sedimentary rocks form when sediment builds up The sediment compacts into rock Metamorphic rocks were once different kinds of rock Heat and pressure changed them

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