| A | B |
|---|
| mineral. | A natural, solid substance that has a definite chemical composition and physical structure. |
| magma. | Melted rock within the Earth. |
| igneous rock. | A rock formed when magma or lava cools and hardens. |
| lava. | Magma that reaches the Earth's surface. |
| weathering. | The process of breaking rock into smaller pieces. |
| erosion. | The movement or transportation of sediment to new locations. |
| deposition. | The dropping of sediment from wind or water that slows down, or from ice that melts. |
| sedimentation. | The process of building up layers of sediment over millions of years. |
| cementation. | The gluing together of particles of sediment. |
| clastic rocks. | One of a group of sedimentary rocks that is made of sediments that were weathered, transported, and deposited in layers. |
| chemical rocks. | One of a group of sedimentary rocks that is made from minerals that were dissolved in water, came out of a solution, and were then deposited. |
| metamorphism. | The process by which any kind of rock is changed into metamorphic rock. |
| rock cycle. | A process by which rocks are formed from one another. |
