1. The Rock Cycle

2. What is a rock?
A rock is a mixture of minerals, rock pieces, organic matter, etc.

3. What is the rock cycle?
To show how rocks slowly change through time, scientists have created a model called the rock cycle.
It illustrates the processes that create and change rocks.

4. Predicting the Rock Cycle

5. Beginning With Metamorphic Rock
Metamorphic Rock (formed under great heat & pressure)
Above the Ground
Below the Ground
May be melted to reform magma
Rock may weather & erode; sediments form
The magma may cool
Sediments fall into layers
Igneous Rock
Sedimentary Rock

6. Beginning With Sedimentary Rock
Sedimentary Rock (formed when layers of sediment are cemented together)
Above the Ground
Below the Ground
Rock may weather & erode; sediments form
May be melted to reform magma
Sediments fall into layers
The magma may cool
Layers may be crushed together with heat & pressure
Sedimentary Rock
Igneous Rock
Metamorphic Rock

7. Beginning With Igneous Rock
Igneous Rock (formed when magma & lava cools & crystallizes)
Above the Ground
Below the Ground
Rock may weather & erode; sediments form
May be melted to reform magma
Sediments fall into layers
The magma may cool
May be crushed together with heat & pressure
Sedimentary Rock
Igneous Rock
Metamorphic Rock

8. Putting it all together……