C1a
- Created by: anniedarlington
- Created on: 22-03-15 21:50
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- C1
- getting metals from rocks
- as tech improves, it may be possible to extract more metal from low grade ores
- copper for wiring cannot be reduced by carbon as it would be too impure
- bioleaching
- bacteria used to separate elements and gain energy from bond, which separates out the compound, copper can be filtered from leachate
- phytomining
- growing plants in soil that contains copper, builds up in leaves, burn plants and collect copper from ash
- supply of copper-rich ores is limited
- aluminium and titanium
- low density, highly corrosive and low vs high strength
- alloys
- a mixture of two or more metals or a mixture of a metal and a non-metal
- iron
- high carbon steel- 1.5% carbon - blades for tools
- iron from a blast furnace - nothing added - ornamental railings - v brittle
- low carbon steel - 0.1% carbon - car bodies
- stainless steel - chromium added - cutlery
- crude oil
- petrol, kerosene, diesel, oil, bitumen
- longer chain = lubricant (gloopier) and wont vapourise
- predictions of reserves running out were wrong as new extraction methods and oil reserves have been found
- risk of oil spilling into sea
- acid rain
- can be reduced by - reducing fossil fuels burned, remove sulphur from fuel before burning, using scrubbers in power station chimneys to remove SO2
- polymerisation
- polymers and corn starch combined to make plastic bags
- getting metals from rocks
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