Chemistry- C10 Part B

1. To prevent ... : Painting/Coating with plastic- Good for big structures. Electroplating- uses electrolysis and reduces metal ions. Oiling/ Greasing- Used with moving parts (7)
4. Iron corrodes easily~ It ... To ... Iron needs to be in contact with both oxygen and water. ... is actually Hydrated Iron (III) Oxide. ... flakes off and it only happens on the surface (4)
5. Extraction of copper: ...- Involves growing plants in soil containing copper. Plants can't use or get rid of the copper so it eventually builds up in the leaves. Burning the plants, leaves ash containing soluble copper compounds and copper get be got (11)
8. ... and adaptations have been made to use lower amounts of finite resources and reduce damage to the environment. E.g. Catalyst- uses less energy (12)
10. ... finite resources has risks. You have to balance the social, economic and environmental effects of ... E.g. Mining- Provides local jobs, money and useful products but is bad for the environment because is creates pollution, uses a lot of energy (10)

2. ... resources form without any human input- they include anything that comes from the sea, earth and air (7)
3. ... also corrodes in air- but not completely destroyed because ... oxide forms on the outside layer (9)
6. ... is where metals react with substances in their environment and are gradually destroyed (9)
7. ... (non-renewable) resources can't reform quickly enough. They include fossil fuels and nuclear fuels (uranium and plutonium). Also includes minerals and metals found in ores (6)
9. ... is finite. Extracting low grade ores are new methods to use it (6)

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