BCJS+4.3

toc =Chapter 4.3=

Vocabulary

 * Gemstone:** Hard mineral with usually bright, glassy luster
 * Ore:** Rock containing metal or useful mineral
 * Smelting:** Process separating the useful metal from other elements
 * Alloy:** Two or more metals (solid) mixed

Outline

 * **Useful minerals**
 * **Gemstones**
 * Beautiful and rare
 * Are used for jewelry, also mechanical parts and polishing/grinding
 * **Metals**
 * Iron, Silver, and Copper are such examples.
 * They are pliable and bendable.
 * Metals can be used for practically anything.
 * **Others**
 * Talcum, Fluorite, Quartz
 * Great variety of uses
 * Ore is usually not pure metal
 * Prospecting and mining are needed to obtain minerals
 * Prospectors find ores using tests
 * Examines plants on surface
 * Tests streams for chemicals
 * Explosions underground creates shock waves
 * Mining to gets ores and minerals
 * Can pollute/harm land
 * Strip mining; Raking away soil
 * Open pit mine; Deep, vertical hole in earth
 * Shaft mine; Tunnels through the ground, follows veins like burrows