| A | B |
|---|
| mineral | solid non-living substance found in nature |
| rock | nonliving material made of one or more minerals |
| igneous rock | forms when melted rock cools and hardens |
| sediment | tiny bits of weathered rock and once living plants and animals |
| sedimentary rock | a kind of rock that forms from sediment |
| metamorphic rock | a rock that has been changed by heating or squeezing |
| weathering | breaking down of rock into smaller pieces |
| erosion | movement of weathered rock |
| glacier | a mass of moving ice that moves slowly across land |
| deposition | the dropping off of weathered rock |
| soil | a mixture of minerals, weathered rocks, and other things |
| humus | bits of decayed plants and animals |
| natural resources | a material on Earth that is necessary or useful to people |
