GCSE Chemistry: Using Resources

Using resources is the closing strand of GCSE Chemistry, and it swaps equations for judgement: how humanity draws what it needs from the Earth, and how chemistry helps it do so without exhausting the source. This quiz covers the full strand.

Sustainability frames the set: the definition of a finite resource (used faster than it forms), and sustainable development in its standard formulation — meeting present needs without compromising future generations, the phrasing the specification adopts directly.

Water chemistry forms the practical heart. The distinction between potable and pure water opens it: safe to drink is not the same as chemically pure, since drinking water legitimately contains dissolved minerals. The treatment sequences follow — filtration then sterilisation for fresh water sources, and the screening, sedimentation and biological treatment stages of sewage processing, tested as a multi-select. Desalination appears with its central drawback, the heavy energy demand that keeps it a last resort.

Life cycle assessment brings in the evaluative skill the exam increasingly favours: the four stages (raw materials, manufacture, use, disposal) and what an LCA actually compares — environmental impacts and resource use, not price or popularity, a distinction one question tests head-on.

Recycling and reuse close the strand with the reasoning behind the advice: recycling metals conserves finite ores and costs less energy than extraction from ore, and reusing glass avoids the energy of remelting raw materials.

Each explanation names the principle at stake, giving the vocabulary — finite, potable, life cycle, sustainable — the precision that evaluation questions require.

• Define finite resources and sustainable development precisely
• Distinguish potable water from pure water and describe fresh water treatment
• List the stages of waste water treatment and the drawback of desalination
• Apply the four stages of a life cycle assessment and what it compares
• Justify recycling and reuse in terms of resource and energy conservation

Topic scope follows the Department for Education's GCSE combined science subject content, using resources strand: sustainable use of resources, potable water and waste water treatment, life cycle assessment and recycling.