1. Chapter 2, Section 3 Mineral Resources Wednesday, November 4, 2009 Pages 62 -- 66 Wednesday, November 4, 2009 Pages 62 -- 66

2. Objectives  Describe how minerals are used.  List the three types of mines.  Explain how ores are processed to obtain metals.  Describe how minerals are used.  List the three types of mines.  Explain how ores are processed to obtain metals.

3. Vocabulary Words  Gemstone  Ore  Smelting  Alloy  Gemstone  Ore  Smelting  Alloy

4. Uses of Minerals  Minerals are the source of metals, gemstones, and other materials used to make many products.

5. Gemstones  Gemstones are hard, colorful minerals.  Gemstones have a brilliant or glassy luster.  Gemstones are valued for their color.  Gemstones are called gems once they are cut and polished.  Gemstones are used mainly for jewelry and decoration.

6. Metals  Minerals are sources of metals such as aluminum, iron, copper, or silver.  Metals are used to make tools and machinery.  Metals all begin as minerals inside Earth’s crust.

7. Other Uses of Mineral  Talc -- baby powder  Quartz -- glass; timepieces  Calcite -- optical equipment.  Kaolin -- china  Gypsum -- cement  Corundum -- polishing and cleaning products

8. Ores  An ore is a rock that contains a metal or economically useful mineral.  Most metals do not occur in pure form. Gold ore

9. Prospecting  People who look for an ore deposit are called prospectors.  They observe the land surfaces.  They examine surrounding plants.  They look at results of sound waves.

10. Mining  There are three types of mine:  Strip mines  Open pit mines  Shaft mines  There are three types of mine:  Strip mines  Open pit mines  Shaft mines

11. Strip Mining  Earthmoving equipment scrapes away soil to expose ores.

12. Open Pit Mining  Giant earthmoving equipment is used to dig a tremendous pit.  Pits can extend 100’s of meters below the surface.  Giant earthmoving equipment is used to dig a tremendous pit.  Pits can extend 100’s of meters below the surface.

13. Shaft Mines  Shaft mines have a network of tunnels.  They follow veins of the ore.  Shaft mines have a network of tunnels.  They follow veins of the ore.

14. Smelting  Smelting is the process where ore is melted to separate the useful metal from other elements that ore contains.  Involves mixing an ore with other substances and then heating the mixture to a very high temperature.  The heat causes the metal to separate from the oxygen with which it is combined.  After smelting, an addition process is added to remove impurities.  Smelting is the process where ore is melted to separate the useful metal from other elements that ore contains.  Involves mixing an ore with other substances and then heating the mixture to a very high temperature.  The heat causes the metal to separate from the oxygen with which it is combined.  After smelting, an addition process is added to remove impurities.

15. Homework  Workbook Section 2.3 due 11/6  Vocabulary quiz 2.3 only on 11/6  CHAPTER 2 TEST RESCHEDULED -- NEW DATE: 11/11.  Workbook Section 2.3 due 11/6  Vocabulary quiz 2.3 only on 11/6  CHAPTER 2 TEST RESCHEDULED -- NEW DATE: 11/11.