| A | B |
|---|
| rock | a naturally formed solid that is made of one or more minerals |
| hardness | a physical property that describes how easy or difficult it is to scratch the mineral |
| luster | a physical property that describes how light reflects or bounces off a mineral |
| streak | a physical property that describes the color of a mineral’s powdered form |
| cleavage | a physical property that describes how a mineral breaks; cleavage is a smooth flat surface |
| color | the first physical property of a mineral that we can see; some minerals come in one color some come in many colors |
| fracture | a physical property that describes how a mineral breaks; fracture is uneven or curved |
| ore | a mineral that is mined for the valuable substances it contains (gold, iron) |
| crystal | a mineral that has a shape with a repeating pattern of flat surfaces and angled sides |
| mineral | a solid non-living substance found in nature - it is made of the same material all the way through it |
