| A | B |
|---|
| rock cycle | a continuous process by which rocks are created, changed from one form to another |
| bedrock | unbroken solid rock, overlaid in most places by soil or rock fragments. |
| sedimentary rock | rock that settles over time and bands together |
| mineral | a natural solid substance that has a definite chemical composition and physical structure |
| metamorphism | the process by which metamorphic rock is formed |
| magma | melted rock pushed from mantle to the crust |
| lava | magma that is exposed at the earth's surface |
| topsoil | the top layer of soil |
| metamorphic rock | rock made igneous or sedimentary rock |
| igneous rock | formed when melted rock hardens |
