Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
13th March 2025
- 1Tests for Ions, Gases and Flame Tests
Describe the test, and the positive result, for ammonium ions.
- 2Chromatography and Instrumental Analysis
Write the formula for calculating an Rf value.
- 3Chemistry of the Atmosphere
Give two human activities that increase the amount of greenhouse gases in the atmosphere.
- 4The Atmosphere: Evolution and Greenhouse Gases
Explain why the natural greenhouse effect is necessary for life on Earth, rather than being a purely harmful process.
- 5Climate Change and Atmospheric Pollutants
Explain why carbon monoxide is dangerous even though it has no smell.
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