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rocks and minerals
| Question | Answer |
|---|---|
| Naturally occurring: | Created by nature. |
| Inorganic: | Cannot be created using any living thing, only NON-living. |
| Solid: | Minerals have a definite volume, and shape |
| Crystal Structure: | particles of a mineral lines up in a pattern over and over again |
| Definite chemical composition: | A mineral has definite chemical make-up of certain elements. |
| Mohs hardness scale: | Identifies hardness from softest to hardest of ten minerals. Color: Easily observed physical property. |
| Streak: | The color of the minerals powder is easily observed |
| Luster: | its reflection of light in the minerals surface. |
| Density: | How tightly packed the matter is in the mineral. |
| Crystal system: | The minerals actual polygon shape, example cube, or hexagon. |
| Cleavage: | Mineral breaks along a flat surface, smooth break. |
| Fracture: | Mineral breaks in an irregular way, jagged and uneven. |
| Igneous Rocks Classified: | formed from intense heat that comes from magma or lava. |
| Intrusive Rocks: | igneous rocks formed from magma that hardens beneath Earth's surface. |
| Texture: | depends upon the size and shape of the crystals |
| Porphyritic texture: | large crystals surrounded by small crystals, which form when magma cools in two stages. |
| Uses of Igneous Rocks: | Used because they are hard, dense, and durable |
| Basalt: | gravel |
| Pumice: | cleaning and polishing |
| Perlite: | soil mixes |
| Obsidian: | sharp tools |
| Granite: | building materials |
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