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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,  ...

simple.wikipedia.org/wiki/Rock_cycle

The rock cycle is the process by which rocks of one kind change into rocks of ... There are three main kinds of rocks: igneous rock, metamorphic rock, and ...

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

ROCKS come in cool colors, shapes, textures, and sizes and are found all around you, but how much do you REALLY know about them? The rock cycle.

www.learner.org/interactives/rockcycle/diagram.html

A useful way to illustrate how the three main types of rock are related to one another and how changes to rocks happen in a recurring sequence is the rock cycle.

rocksandminerals.com/MineralInformation/RockCycle.html

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

www.khanacademy.org/partner-content/mit-k12/mit-k12-ea/v/rock-cycle

We bet you thought that rocks are just rocks, but the truth is there are three different kinds of rocks. Learn the differences between sedimentary, metamorphic and ...

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, ...