JLKP+4.3

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 * Section 4.3- Mineral Resources (back to homepage)**

Vocabulary

gemstone**-** a hard colorful mineral that has a brilliant or glassy luste**r alloy****-**a solid mixture of two or more metals
 * ore-**a rock that contains metal or economically useful mineral
 * smelting**-the process of separating metal from ore


 * Diagrams**

Saphires can be yellow or blue.

Outline
 * ***The Uses of Minerals***
 * metal body
 * window glass of a car
 * ***Gemstones***
 * hard, colorful
 * used for jewelry and decoration
 * used for grinding and polishing
 * used for mechanical machine
 * ***Metals***
 * aluminum, iron, copper, silver are all metal
 * can be stretched into wire, flattened into sheets, or molded without breaking
 * is in metal filament in a light bulb, or steel grinders
 * **Other Useful Minerals**
 * we use minerals in fertilizers, medicine, and building materials
 * quartz can be used in glass
 * gypsum is used in cement
 * **Ores**
 * most copper in the world is from ores
 * **Prospecting**
 * they search for ore deposits
 * use special tools to find ore deposits
 * **Mining**
 * strip mining leaves scars
 * open-pit mining is big pits
 * shaft mining is getting ores from veins
 * **Smelting**
 * takes metal from ores
 * involves mixing in coke