| A | B |
|---|
| rock | natural, solid material made of one or more minerals |
| igeneous rock | rock formed from melted minerals that have cooled and hardened |
| sedimentary rock | rock formed from pieces of other rock and remains of living things |
| metomorphic rock | rock that has been changed by intense heat, pressure, and chemical reactions |
| rock cycle | series of natural changes that cause one type of rock to become another type of rock |
| magma | hot, liquid rock inside the earth |
| extrusive rock | igeneous rock that forms from cooled lava on the earth's surface |
| intrusive rock | igeneous rock that forms underground from cooled magma |
