Science B, Combined (9-1) - Twenty First Century Science Suite J260 9-1: C1: Air and water Topical Past Paper Questions
OCR GCSE (9-1) Science B, Combined (9-1) - Twenty First Century Science Suite J260 (9-1) past-paper questions on C1: Air and water, free. This topic is regularly examined across 6 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
Nina is studying potable (clean drinking) water. (a) Two sources of potable water are waste water and sea water. Identify one other source of potable water. [1] (b) The diagram shows the stages in the treatment of waste water. (i) Describe the function of the 'aeration' and 'bact…
Carbon dioxide gas in the atmosphere is one cause of the greenhouse effect. (a) Explain how carbon dioxide causes the greenhouse effect. Include ideas about radiation from the Sun. [3] (b) Carbon dioxide gas, $ \mathrm{CO}_{2}(g) $ dissolves in seawater to form dissolved carbon d…
Nina investigates the combustion of ethanol. (a) Complete the balanced symbol equation for the combustion of ethanol in air. $$ \mathrm{C_{2}H_{5}OH}~+~... 濮阳 \mathrm{O_{2}}\rightarrow... 濮阳 \mathrm{CO_{2}}~+~... 濮阳 \mathrm{H_{2}O} $$ (b) Nina uses this apparatus for her experime…
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