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Chapter 8.1 and 8.2

Minerals and rocks

TermDefinition
Mineral a naturally occurring solid that can form by inorganic processes and that has a crystal structure and a definite chemical composition
Inorganic material that were not part of a living thing
Crystal repeated pattern of a minerals structure
Streak the color of a minerals powder
Luster used to describe how light is reflected off a minerals surface
Mohs Hardness Scale used to rank the hardness of minerals.
Cleavage a mineral that splits easily along flat surfaces
Fracture when a mineral breaks apart in an irregular way
Geode rounded, hollow rock that is often lined with mineral crystals
Crystallization the process by which atoms are arranged to form a material that has a crystal structure.
Solution a mixture in which one substance is dissolved in another
Vein a narrow channel or slab of a mineral that is different from the surrounding rock
Rock Forming Mineral minerals that make up most of the earths crust - about 20
Granite generally light colored rock that has high silica content - continental crust
Basalt dark colored rock that has low silica content - oceanic crust
Grains particles of minerals or rocks
Texture the look and feel of a rocks surface
Igneous Rock forms from the cooling of lava or magma
Sedimentary Rock forms when small particles of rocks or the remains of plants and animals are pressed and cemented together
Metamorphic Rock forms when rock is changed by heat and pressure or by chemical reactions
Created by: MacyB