|
 crystal | solid form of a material identified by its special shape or pattern |
| dissolve | to disappear in a liquid |
| earth material | something that comes from the earth, such as rocks, minerals, water, soil |
| evaporate | to dry up |
| geologist | a person who studies the earth, and the materials of which it is made |
| hardness | a mineral property found by seeing which tools can scratch the mineral |
| property | something you can observe, such as color, shape or texture |
| rock | made up of different ingredients called minerals |
| luster | the way the surface of a mineral reflects light |