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rock cycle

The Rock Cycle
Image: iStockphoto.com/Tashka

The Rock Cycle

Recycling makes the world go ‘round — especially for rocks. Though they look hard and solid (as a rock!), the three types of rocks on planet Earth constantly transform, thanks to the physical and chemical processes of pressure, heat, weathering, and erosion, both deep inside the Earth and on the surface. Discover what the rocks turn into.

MIT
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Rocky’s Journey Around the Rock Cycle

Rocky’s Journey Around the Rock Cycle

No rest, even for rocks. Follow Rocky on a never-ending journey to learn all about the process of recycling Earth over millions and millions of years. More...

Interactive
Oxford University
Rock Cycle Processes

Rock Cycle Processes

Deformation, erosion, uplift, compaction, crystallization, and more rock cycle processes will be revealed to you in one image. See what’s there before testing what you’ve learned. More...

Interactive
The Geological Society of London
Cycles

Cycles

Heating, melting, cooling, weathering, and sliding around — rocks are in a dizzying cycle that never stops. Investigate how mountains break up and become new once again. More...

Article
Exploring the Environment
Rock Cycle: Face of the Earth

Rock Cycle: Face of the Earth

Tectonic forces push rock to Earth’s surface, only to be worn by erosion or pushed by wind and water to transform into another type of rock. Dig into details of sedimentary, metamorphic, and igneous rocks that continually undergo change. More...

Article
Southern Kings Consolidated School
Melting Rocks

Melting Rocks

Changes in temperature, pressure, and water content can turn solid rock into liquid magma. Raise or lower these conditions to see if you can melt a rock. More...

Interactive
Annenberg Learner
Our World: The Rock Cycle

Our World: The Rock Cycle

Since Earth’s beginning, its three types of rocks have continually changed, thanks to the rock cycle. Find out why some scientists are studying the moon’s rocks, and what they hope to discover. More...

Video
NASA
Rock and the Rock Cycle

Rock and the Rock Cycle

Always on the move, rocks have traveled through the rock cycle for billions of years. Choose a rock type — metamorphic, igneous, sedimentary — and witness what has taken place over geologic time. More...

Interactive
National Earth Science Teachers Association
Rock Cycle

Rock Cycle

They have a huge variety of colors, shapes, textures, and sizes, but all rocks go through the same cycle, changing very slowly from one kind to another. Explore the rock cycle and transform a rock yourself. More...

Interactive
Annenberg Learner
Scientist Profile: Mineralogist

Scientist Profile: Mineralogist

Mineralogist Elizabeth Arredondo studies the amount of water in garnets and other minerals for clues to how the Earth formed. Watch how she identifies unknown minerals and why she says her job “rocks.” More...

Profile
DragonflyTV/PBS

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