| A | B |
|---|
| Rock | a strong, solid substance made of one or more minerals |
| igneous rocks | formed when molten rock cools and solidifies |
| sedimentary rocks | formed when pieces of rocks get cemented together |
| metamorphic rocks | rocks are exposed to extreme heat and pressure |
| Rock Cycle | The continuous changing of rocks from one kind to another over long periods of time |
| Extrusive Rocks | lava cools above the Earth’s surface |
| Intrusive Rocks | magma cools below the Earth’s surface |
| Clastic rocks | most common sedimentary rock, made from rock pieces of various shapes and sizes cemented together |
| Organic rocks | form from remains of living things |
| Chemical rocks | formed from chemical action or evaporation |
| Metamorphism | the changing of a rock due to heat, pressure, and chemical reactions |
