Extracting aluminium

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1. What properties does aluminium have?

  • all of the above
  • Low density, excellent conductor, of electricity, easily shaped, resists corrosion
  • corrodes easily
  • heavy
  • very strong
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2. Why does it cost so much to extract aluminium?

  • Very rare
  • Very expensive- lots of heat and electricty is needed
  • Have to pay the people to extract the metal
  • It is worth a lot of money

3. Why does aluminium not corrode easily?

  • Has a protective layer of aluminium oxide
  • it is strong
  • it isnt reactive so doesnt react to form rust etc
  • expensive

4. How do we extract aluminium?

  • strongy heat it in a blast furnace
  • Displace it using carbon
  • Using electrolysis
  • Dig up its ore from the crusts of the earth

5. Why is aluminium so useful?

  • can be used to make cars
  • very cheap and there is lots of it
  • It resists corrosion and is very light
  • Very strong

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