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The rock cycle describes the constant process in which the three main types of rock--sedimentary, metamorphic and igneous--are broken down and transformed into each other.

en.wikipedia.org/wiki/Rock_cycle

The rock cycle is a basic concept in geology that describes the time-consuming transitions through geologic time among the three main rock types: sedimentary,  ...

www.cotf.edu/ete/modules/msese/earthsysflr/rock.html

The Rock Cycle is a group of changes. Igneous rock can change into sedimentary rock or into metamorphic rock. Sedimentary rock can change into ...

www.mineralogy4kids.org/rock-cycle

Rocks are the most common material on Earth. They are naturally occurring aggregates of one or more minerals. Rock divisions occur in three major families  ...

www.learner.org/interactives/rockcycle

The rock cycle. Discover rock secrets through these activities. Create a rock collection as you learn about the three main types of rock, find out how to tell the  ...

kidsgeo.com/geology-for-kids/0025B-rock-cycle.php

The Rock Cycle Written for the KidsKnowIt Network by: Brandon Guymon. There are three main types of rocks: igneous, sedimentary, and metamorphic. Each of ...

www.brainpop.com/science/earthsystem/rockcycle

In this BrainPOP movie, Tim and Moby explain how one type of rock can actually become another! You'll learn about the three types of rock: Igneous, ...

rocksandminerals.com/MineralInformation/RockCycle.html

The Rock Cycle is a model that describes how rocks change from one form to another.

www.classzone.com/cz/redirect/esm05_pg73_es0602-2.html

This cutaway view of Earth shows where some common rock-forming processes occur. Embedded animations will illustrate the path of a rock moving through the  ...

www.ck12.org/earth-science/Rocks-and-Processes-of-the-Rock-Cycle/lesson/Rocks-and-Processes-of-the-Rock-Cycle-HS-ES

Feb 24, 2012 ... Presents the three major rock types and the rock cycle.