| A | B |
|---|
| Mineral | This naturally occuring solid has a definite chemical composition and a crystalline shape. |
| Inorganic | A substance that is not formed from living things or the remains of living things. |
| Crystal | A solid in which the atoms are arranged in a definite, repeating pattern. |
| Luster | The way a mineral reflects light from its surface. |
| Hardness | The ability of a mineral to resist being stratched. |
| Streak | The color left by a mineral when it is rubbed against a hard surface. |
| Density | The amount of matter in a given space. |
| Cleavage | The tendency of a mineral to break along smooth, definite surfaces. |
| Fracture | The way a mineral break along a rough jagged surface. |
| Ore | A useable substance that can be removed from rocks and minerals. |
| Metal | A shinny, easily shaped element that conducts electricity and heat. |
| Nonmetal | An element that is hard to shape, has a dull surface, and does not conduct electricity and heat. |
| Gemstone | A hard beautiful substance that can be cut and polished for jewelry. |
| Rock | A hard substance composed of one or more minerals. |
| Igneous rock | A rock formed from molten rock. |
| Sedimentary rock | A rock formed from sediments that have been compacted and cemented together. |
| Sediment | Pieces of rocks and other materials that have been carried along and deposited by water and wind. |
| Metamorphic rock | Rocks formed by heat and pressure. |
| Rock cycle | The continuous changing of rocks from one kind to another. |
| Extrusive rock | An igneous rock formed from lava. |
| Intrusive rock | An igneous rock formed from magma. |
| Clastic rock | A sedimentary rock formed from pieces of existing rocks. |
| Organic Rock | A sedimentary rock formed from material that was once alive. |
| Chemical rock | A sedimentary rock formed from inorganic processes such as evaporation. |
| Metamorphism | The process by which metamorphic rocks are formed. |
