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22 Cards in this Set
- Front
- Back
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Give three examples of renewable resources: |
1. Timber 2. Fresh water 3. Food 4. Wind Any others |
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Three examples of finite resources: |
1. Coal 2. Nuclear fuels 3. Mineral/metals |
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Give a pro and con of mining ores: |
Pro: creates jobs, useful products made, brings money to an area Con: bad for environment |
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What does sustainable development mean? |
Takes account for the needs of the present society without damaging the lives of future generations. |
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What can be developed to increase efficiency of industrial processes? |
Catalyst |
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Name the two types of low-grade ores: |
Bioleaching Phytomining |
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Name the general advantage and disadvantage of bioleaching and phytomining: |
Pro: much smaller environmental impact Con: slow |
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Why is it important to recycle metals? |
Finite recourse Extracting takes a lot of energy, which comes from fossil fuels |
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Which of its features is glass separated by when it's recycled? |
Colour Chemical composition |
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Name the 4 stages of life cycle assessments: |
Getting raw materials Manufacture and packaging Using the product Product disposal |
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What makes LCAs less useful and how can this be stopped? |
Selective LCAs where a company focuses on the positives, this can be stopped with peer-review |
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What is potable water? |
Water you can drink |
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What are the two important steps in making water safe to drink? |
Filtration Sterilisation |
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In very dry countries sea water must be used as potable water, which two processes can be chosen from that it must undergo first? |
Desalination or reverse osmosis
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Why don't we use sea water and make it potable? |
Because desalination is extremely expensive |
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What are the four stages of sewage treatment called and what do they do? |
Screening - removes large materials (e.g. twigs / plastic bags)
Sedimentation - heavier suspended solids sink to bottom, effluent flows to the top
Aerobic digestion - bacteria break down any organic matter Released back into environment |
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What can the sludge in sewage treatment be used for(2)? |
Fertiliser Natural gas |
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:) |
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What does leachate mean? |
It is the solution produced by bioleaching |
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How does bioleaching work? |
Bacteria conversation copper compounds into soluble copper compounds , separating them |
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How does phytomining work? |
Involves growing plants in soil that contains copper which then gets removed from the plants |
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How do paper/plastic bags compare in LCAs? |
wins 2. Loads of waste from processing vs usable waste - plastic wins 1. Timber vs crude oil - paper wins2. Loads of waste from processing vs usable waste - plastic wins 3. Used once vs reusable - plastic wins4. Recyclable but not biodegradable takes landfill vs biodegradable recyclable - paper wins 3. Used once vs reusable - plastic wins 4. Recyclable but not biodegradable takes landfill vs biodegradable recyclable - paper wins |
