THE ROCK CYCLE
It's hard to think of rocks as moving objects unless you pick one up and throw it! But rocks do move—slowly— as they are created, destroyed, and changed into new types of rock. The way rocks change over time is called the rock cycle.
The rock cycle takes place over a very long period of time. It may take millions of years for a rock to change from one type to another. Understanding the rock cycle can help us understand how the Earth was formed and continues to change.
- THE SECRETS IN ROCKS - Just how old is the Earth?
- LAND FORMATION - Constructive Forces, Folding, Faults, Magnitude and Effect, Volcanic Eruptions, Deposition of Sediment, Destructive Forces, Weathering, Erosion
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