CCKH+4.3

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Vocabulary:

 * gemstone:** a hard, colorful mineral that has a brilliant or glassy luster.
 * ore:** a rock that contains a metal or economically useful mineral.
 * alloy:** a solid mixture of two or more metals.

Outline:

 * **Mineral Resources**
 * copper shaped into ornaments / weapons
 * **The uses of minerals**
 * minerals source of metals, gemstones etc.
 * Gemstones
 * gemstones
 * Metals
 * minerals sources of metals- aluminum, iron, copper, silver
 * other useful minerals
 * minerals used- medicine, food, fertilizers
 * flourite- aluminum, steel
 * calcite- microscopes
 * **Ores**
 * ores
 * **Prospecting**
 * prospector- searches for ore deposits
 * **Mining**
 * 3 types of mines- strip mines, open pit mines, shaft mines
 * **Smelting**
 * smelting- to remove metal from ore

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