| A | B |
|---|
| Mineral | A naturally occurring, inorganic solid that has a crystal structure and a definite chemical composition. |
| Crystal | A solid in which the atoms are arranged in a pattern that repeats again and again. |
| Inorganic | Not formed from living things or the remains of living things. |
| Element | A substance composed of a single kind of atom. |
| Compound | A substance in which two or more elements are chemically joined. |
| Solution | A mixture in which one substance dissolves in another. |
| Vein | A narrow channel or slab of a mineral that is much different from the surrounding rock. |
| Gemstone | A hard, colorful mineral that has a brilliant or glassy luster |
| Ore | Rock that contains metal or economically useful mineral. |
| Smelting | The process by which ore is melted to separate the useful metal from other materials. |
| Alloy | A solid mixture of two or more metals. |
| Texture | The look and feel of the rock's surface. |
| Grain | Particles of minerals or other rocks |
| Igneous Rock | A type of rock that forms from the cooling of molten rock at or below the surface. |
| Extrusive Rock | Igneous rock that forms from lava on Earth’s surface. |
| Intrusive Rock | Igneous rock that forms when magma hardens beneath the Earth’s surface. |
| Sedimentary Rock | A type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together. |
| Sediment | Small, solid pieces of material that comes from rocks or organisms. |
| Metamorphic Rock | A type of rock that forms from an existing rock that is changed by heat, pressure, or chemical reactions. |
| Rock Cycle | A series of processes on Earth's surface and inside the planet that slowly change rocks from one kind to another. |
