| A | B |
|---|
| minerals | pure solid material found in the earth's crust |
| igneous rock | rocks formed from magma |
| magma | melted rock within the earth |
| lava | magma that reaches the surface |
| sediment | material such as mud, sand, or gravel often carried by wind and water moving across land |
| sedimentary rock | rock formed from many years of sediment slowly hardening |
| fossils | traces of plants and animals found in sedimentary rock |
| metamorphic rock | kind of rock formed when other kinds of rocks are changed by great heat and pressure |
| crust | a thin layer of rock that covers the earth |
| mantle | makes up most of the earth |
| core | the inner layer of the earth |
| hardness | the ability to scratch a mineral |
| streak | the color a mineral leaves after being scratched |
