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2 . Where does metal come from ?

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celina
17 diapositives · 549 Views · Aug 10, 2014

2 . Where does metal come from ?. It is extracted from ores in mines near the Earth ’ s crust. Ores are not pure substances; they contain many types of particles. Separation techniques must be used in order to extract metal from its ore.

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2 . Where does metal come from ?
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  1. 2. Where does metal come from? • It is extracted from ores in mines near the Earth’s crust. • Ores are not pure substances; they contain many types of particles. • Separation techniques must be used in order to extract metal from its ore. http://franklin-sterlinghill.com/franklinminerals/ore%20minerals.shtml

  2. 3. What are some of the most commonly used metals?

  3. Periodic Table

  4. p. 379 (applications) cars electrical wires cans gutters fireworks heating elements surface coatings utensils

  5. Metals

  6. 4. What are some of the properties of metals?

  7. Properties of Metals 1. Metals have luster. This means they are shiny

  8. Properties of Metals 2. Ductile metals can be drawn into wire.

  9. Properties of Metals 3. Malleable metals can be hammered into sheets

  10. Properties of Metals 4. Conductors Metals are good conductors of electricity and heat

  11. Properties of Metals 5. A chemical property of metal is its reaction with water and oxygen. This results in corrosionand rust.

  12. 5. What is the difference between a metal and an alloy? • A metal is a pure substance whereas as alloy is a mixture of a metal and one or more metallic or non-metallic substances.

  13. 6. What is a ferrous alloy and how does it differ from a non-ferrous alloy? • Ferrous alloys have iron as their main constituent whereas non-ferrous alloys have another metal other than iron as their main constituent.

  14. 7. Give an example of a ferrous alloy and a non-ferrous alloy. • Ferrous: steel (iron + 1.5% carbon), cast iron (iron + 2% carbon) • Non ferrous: brass (copper + zinc), bronze (copper and tin)

  15. 8. What do metal and wood have in common? • They are both raw materials.

  16. 9. How is metal different than wood? • Metal conducts electricity whereas wood doesn’t