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Welborn Test 10/28
Chapter Test/Test on Minerals
A mineral that is made up of only one element | Native Element |
Minerals that break at random and with rough or jagged edges | Fracture |
Most common mineral found in the Earth's crust | Quartz |
Color, Crystal, Cleavage/Fracture, Luster, Hardness, Streak | Mineral Properties |
Shape of mineral formed by repeating pattern of atoms. Some mineral have well defined crystals (cube, hexagon, etc.) while others are irregular | Crystal |
A mineral lacking both oxygen and silicon | Non-Silicates |
A substance that cannot be broken down into simpler substances by chemical means | Element |
The way the mineral breaks. Minerals break away along smooth, flat surfaces and every fragment has the same general shape. | Cleavage |
The color of the streak can be different from the mineral. The color of the powdered form of the mineral. Minerals must be softer than the streak plate. | Streak |
The number of protons equals electrons | Atomic Number |
The ore is mined from rocks that have not been exposed too weathering in a tropical environment | Bauxite/Aluminum |
Scale from 1 (softest) to 10 (hardest). Test by seeing if the mineral can scratch different objects. | MOHS Hardness Scale |
How easily a mineral can be scratched | Hardness |
A mineral containing both silicon and oxygen | Silicates |
Surface reflection | Luster |
Shiny, like metal | Metallic |
Least reliable test. Many minerals have the same _____. | Color |
A naturally occurring inorganic solid, with a crystal shape that repeats itself, and a definite chemical composition (elements are always the same) | Mineral |
A rock that contains high enough concentrations of a defined substance such as metal, so it can mined for profit. | Ore |
Most abundant metallic mineral | Iron |
Dull, non-shiny, surfaced | Non-Metallic |
Most abundant elements in Earth's crust | Silicon, Oxygen |
Mass/Volume | Density |
Naturally formed, inorganic, crystal-like structure, solid structure, specific chemical composition | Mineral |
All minerals are solids. A solid matter with tightly packed atoms or ions that has a definite shape and volume. | Solid |