Rocks and Minerals
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Mineral | A substance that is solid, inorganic, and it has to naturally occur. It has to have a definite chemical composition, and a crystal structure also.
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| Crystal Structure | The definite pattern in the way that particles in a substance are arranged.
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| Moh's hardness scale | A scale that rates ten minerals based on their hardness.
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| Luster | The characteristic of reflecting light.
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| Hardness | The characteristic of a mineral's ability to resist being scratched.
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| Cleavage | A mineral that splits easily along a flat surface has this.
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| Fracture | This describes when a mineral breaks apart in an irregular way.
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| Streak | The characteristic of a mineral when you stratch it on unglazed porcelain and the color of the powder it leaves.
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| Crystallization | The process by which atoms are arranged to form a material with a crystal structure.
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| Solution | A mixture in which one substance dissolves in another.
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| Vein | A narrow channel or slab of a mineral that is much different from the surrounding rock.
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| Geode | A rounded, hollow rock that is often lined with mineral crystals.
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| Element | A substance composed of a single kind of atom.
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| Compound | A substance formed when two or more elements combine and lose their distinct properties.
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| Inorganic | Something that is not formed from living things; a mineral has to be this to be a mineral.
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| Florescence | To glow under ultraviolet light; some minerals are this.
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| Texture | The look and feel of a rock's surface.
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| Fine grained | Describes the size of the rock's grains. Formed when magma cools rapidly, an example of this is slate. This is smaller particles of minerals and other rocks that make up a rock.
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| Coarse grained | Describes the size of the rock's grains. Formed when magma cools slowly, an example of this is slate. This is larger particles of minerals and other rocks that make up a rock.
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| Porphyry | A rock with large crystals surrounded by small crystals.
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| Intrusive igneous rock | Igneous rock that forms inside earth, from magma hardening beneath earth's surface.
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| Extrusive igneous rock | Igneous rock that forms from lava that erupted onto Earth's surface.
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| Sediment | Small, solid pieces of material that come from rocks or living things.
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| Compaction | Sediments pressed together in layers.
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| Erosion | Water or wind loosen and carry out fragments of rock.
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| Cementation | Dissolved materials glue sediments together.
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| Deposition | Sediments settle out of water or wind.
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| Clastic rock | Sedimentary rock that forms when rock fragments are squeezed together.
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| Chemical rock | Sedimentary rock that forms when minerals dissolved in a solution crystallize.
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| Organic rock | Sedimentary rock that forms from the remains of plants and animals.
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| Foilated | Metamorphic rocks with grains arranged in parallel layers or bands.
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| Non-foilated | Metamorphic rocks with grains arranged randomly.
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