| A | B |
|---|
| igneous rock | results from melted rock that cools and hardens |
| metamorphic rock | formed by heat and pressure |
| mineral | a nonliving substance that occurs naturally in Earth's crust |
| properties | characteristics like color, hardness, luster, and streak |
| relative age | the age of a rock that is found by comparing the rock to other rocks |
| resource | any material found on Earth that can be used by people |
| rock cycle | the name of the process by which rock changes from one form to another |
| sedimentary rock | results from sediment that is pressed and cemented together |
| rocks | natural objects that are made of minerals |
| magma | melted rock |
| bands | when minerals from rocks get pressed into thin layeers |
| diamond | the hardest mineral of all |
| luster | the way light bounces off a mineral |
| Mohs' Scale | measures hardness of a mineral |
| streak | the color of the powder when you scratch a mineral against white tile |
| texture | property that describes the appearance of a rock, related to the size of the mineral grains |
