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Earth’s Surface: Chapter 2 Section 3. MINERALS ARE VALUABLE RESOURCES Objectives: 1. Identify ways that minerals are used in industry and art. 2. Explain how minerals may form 3. Explain how minerals are mined. Minerals in Industry and Art. 1. Metals for cars and airplanes
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Earth’s Surface: Chapter 2 Section 3 • MINERALS ARE VALUABLE RESOURCES • Objectives: • 1. Identify ways that minerals are used in industry and art. • 2. Explain how minerals may form • 3. Explain how minerals are mined
Minerals in Industry and Art • 1. Metals for cars and airplanes • 2. Quartz and Feldspar are used for glass • 3. Fluorite and Calcite for toothpaste • 4. Mica and Talc for paint • Minerals are used in birthstones (gemstone) • Gemstones are grinded and polished before being used in jewelry
Minerals Form in Different Ways • 1. Water Evaporates: Halite and Gypsum can form • 2. Hot Water Cools: Gold • 3. Molten Rock Cools: Magma is molten rock inside the Earth - Minerals can also form from lava -Example: Quartz forms from lava and magma • 4. Heat and Pressure Cause Change: Graphite • 5. Organisms Produce Minerals: Oysters and Clams produce Calcite. -Your body produces apatite (bone & teeth)
Mining • An ore is a rock that contains enough of a mineral to be mined. • Surface Mining: Could be panhandling or strip mining • In strip mining, the plants, soil and unwanted rocks are removed and then the ores are dug out • In open pit mining explosives are used to break up the ground and recover the ores • A much deeper hole is made in open pit mining • In deep mining, miners can work up to 2 miles underground
