The Rock Cycle

The rock cycle is a diagram that you can use to see how rocks form and reform at Earth's surface and at great depths. Rock cycle diagrams graphically explain how each of the three rock types can form and convert to other rock types. You should understand that the rock cycle is illustrated different ways. If you perform a simple image search using the keyword "rock cycle" on the Internet, you will discover hundreds of diagrams that represent the complex process of recycling rock. Most of the rock cycle diagrams use a series of arrows and images to explain how one type of rock can convert into another rock type. Although these diagrams may appear confusing, with a little practice and knowledge, you will easily decode any rock cycle diagram. First, review the different rock forming processes in the table below. Remember, each of the three rock types forms in a unique way.

Rock Type	Term	Definition
Igneous	Cooling	Magma/lava cools and solidifies as temperatures drops
	Crystallization	Process of forming crystals
	Melting	Occurs when a solid turns into a liquid in response to higher temperatures
Sedimentary	Weathering	Breaking rocks into smaller pieces
	Erosion	The movement or transportation of rock materials at Earth's surface
	Deposition	Occurs when sediments drop and collect at the Earth's surface
	Compaction	Gravitational pressure causes material to be packed closer together
	Cementation	Minerals precipitate in-between sediments to cause the loose sediments to solidify into one mass
Metamorphic	Heat	Temperatures increase while remaining solid
	Pressure	Force that causes matter to be compressed
	Recrystallization	Crystals reform while in a solid state

Constructing the Rock Cycle

Now that you have reviewed the processes that are involved in the rock cycle, complete this interactivity to learn how to put together your own rock cycle. Remember that rock cycle diagrams can be created different ways. This is just one example of the many forms this diagram can take. Click the player button to begin.

View a printable version of the interactivity.

 

Rock Cycle Review

How well do you know the rock cycle? Do you know all of the processes that create and change rocks? In this non-graded activity, read each question and select the appropriate answer. Then, click SUBMIT to check your response(s). Click the player button to get started.