Using Resources | AQA GCSE Combined Science Trilogy Chemistry, Foundation tier (8464)
Using Resources
- 97 questions
- 6 subtopics
- Chemistry Paper 2
- Chemistry Paper 2
Using Resources is examined in Chemistry Paper 2.
It covers using the Earth's resources and sustainable development, producing potable water in the UK, desalination, and analysing water samples, waste water treatment, life cycle assessment and ways of reducing the use of resources.
Sample questions from Using Resources
Answer each one closed book first, then open the answer.
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Using the Earth's resources and sustainable development
Suggest why an industrial process that uses less energy and makes less waste is described as more sustainable.
Show the answer
It uses up fewer limited resources and causes less environmental damage, so more is left for future generations. -
Using the Earth's resources and sustainable development
What is a frequency table?
Show the answer
A table that records how many times each value, or each group of values, occurs in a set of data. -
Producing potable water in the UK
Why is potable water not produced in the same way everywhere in the world?
Show the answer
The method chosen depends on the water supplies that are available locally and on local conditions. -
Producing potable water in the UK
What is removed from water as it passes through filter beds?
Show the answer
Insoluble solids such as grit, sand and other suspended particles. -
Desalination, and analysing water samples
Explain why filtration is carried out before sterilising rather than after.
Show the answer
Filtering first removes solids that would shelter microbes and use up the sterilising agent, so sterilising then works properly. -
Desalination, and analysing water samples
What is a representative sample?
Show the answer
A sample whose composition matches that of the whole body of material it was taken from. -
Waste water treatment
Explain why sewage is treated in several separate stages rather than one.
Show the answer
Each stage removes a different kind of material, working from large solids through to dissolved organic matter and microbes. -
Waste water treatment
Why is air bubbled through effluent during its biological treatment?
Show the answer
Aerobic bacteria need oxygen to break down the remaining organic matter and harmful microbes.
The 6 subtopics
One subtopic is one session. Work down the list.
| Subtopic | What it covers | Questions |
|---|---|---|
| Using the Earth's resources and sustainable development | Human needs met by the Earth's resources, how agriculture supplements natural resources, finite and renewable resources, sustainable development and how chemistry improves agriculture and industry, natural products replaced by synthetic ones, and interpreting data in tables, frequency tables, bar charts and histograms, including orders of magnitude. | 21 |
| Producing potable water in the UK | Potable water and why it is not chemically pure, the low levels of dissolved salts and microbes it needs, why methods vary with local supplies, fresh water from rain, and the UK method of choosing a source, passing water through filter beds and sterilising with chlorine, ozone or ultraviolet light. | 14 |
| Desalination, and analysing water samples | Desalination of salty water by distillation or reverse osmosis and why it is expensive, comparing the treatment of ground water and salty water, why filtering comes before sterilising, analysing water samples for pH, dissolved solids and purity, purifying a sample by distillation, and collecting representative water samples. | 20 |
| Waste water treatment | Where waste water comes from and why it must be treated, what sewage and industrial waste need removed, screening, sedimentation into sludge and effluent, anaerobic and aerobic treatment, and comparing ground, salty and waste water as sources. | 14 |
| Life cycle assessment | What a life cycle assessment is and its four stages from raw materials to disposal, what can be quantified and why value judgements make it subjective, selective assessments in advertising, and paper against plastic bags. | 14 |
| Ways of reducing the use of resources | Reducing, reusing and recycling to cut the use of limited resources and energy, materials made from limited raw materials such as metals, glass, clay ceramics and plastics, the impacts of quarrying and mining, the difference between reuse and recycling, and how glass, metals, steel and aluminium are recycled. | 14 |
How the guide is worked
Answering a question from memory stores it far better than reading the answer again. The guide runs that as a fixed procedure on one subtopic at a time, about twenty minutes a session.
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Step 1 · Closed book
Cover the answers. Work through one subtopic and write down what you can. Leave blanks where you have nothing.
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Step 2 · Open book
Go back to the top. Read each printed answer and write it out in full, including the ones you had right.
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Step 3 · Closed book again
Same questions, same order, from memory. The gap between pass one and pass three is the session result.
Read the full method, the return schedule and the research behind it.
Nearby topics
AQA GCSE Combined Science Trilogy Chemistry, Foundation tier Active Recall Guide
Every topic, not just this one. 1,039 questions with their answers.