RLAF+4.1

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Vocab

 * mineral-** a natural crystal-structured solid
 * inorganic-** something that cannot arise from something that was lining.
 * solid-** something with definite shape and volume
 * crystal-** little particles that come from a mineral that forms a solid
 * element-** a substance composed of a type of atom
 * compound-** two or more elements combined
 * Moh's Hardness Scale-** a scale that measures the hardness of minerals
 * streak-** the color of a mineral's powder
 * luster-** how light reflects from a mineral's surface
 * cleavage-** the property that splits easily along flat surfaces
 * fracture-** he outlook after a mineral breaks in an unfashionably way.
 * fluorescence-** the property where minerals grow under ultra-violet light.

Outline

 * What is a Mineral?**
 * many minerals
 * about 3,000 minerals found
 * only 100 are common
 * earth's crust has minerals
 * 20 minerals make earth's crust
 * Naturally Occuring**
 * substances
 * occur naturally
 * building materials
 * manufactured by people
 * Inorganic**
 * minerals
 * must be inorganic
 * coal
 * forms naturally in earth's crust
 * Solid**
 * minerals
 * always solid
 * has definite volume and shape
 * minerals packed up tightly
 * then it can't move
 * Crystal Structure**
 * particles of minerals
 * line up in pattern
 * becomes a crystal
 * crystals
 * have flat faces
 * but they are sharp
 * Definit Chemical Compositon**
 * elements
 * a subtance composed
 * single kind of atom
 * compounds
 * two or more elements
 * combined together
 * Identifying Minerals**
 * Gold Rush
 * lots of gold found
 * people became rich
 * Hardness**
 * Identifying minerals
 * check hardness
 * Mohs hardness scale
 * can compare a mineral's hardness
 * Color**
 * color
 * can be used to identify minerals
 * few minerals have characteristic color
 * Streak**
 * Streak Tests
 * provide clues to mineral's identity
 * minerals and streak colors are often different
 * Luster**
 * the glint from a mineral
 * when the reflection is shiny, it's often metal
 * there are many types of luster
 * you could use the luster of a mineral to identify that mineral
 * Density**
 * the density of a mineral always stays the same no matter what size it is
 * minerals are also placed in water to see how much water it displaces
 * there are lots of equations to do to find the density of a mineral
 * Crystal Systems**
 * many minerals have crystal structures
 * atoms form these crystals
 * there are six particular groups of crystals
 * when crystals form, other things interfere it from growing to its potential outcome
 * many minerals have different types of crystal structures
 * Cleavage and Fracture**
 * cleavage is when a mineral breaks easily on a flat surface
 * different mineral's cleavages look different
 * some cleavages are smooth, and some cleavages are rough
 * fracture is when a mineral breaks awkwardly
 * metals usually have a rough, jagged fracture
 * quartz has a shell-like fracture that is smooth
 * Special Properties**
 * when minerals glow in the dark, it is called fluorescence
 * some minerals fizz
 * some minerals also can be electric
 * because of some of the properties minerals have, other things that are placed on the mineral makes it do unique things





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