Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
18th July 2026
- 1Tests for Ions, Gases and Flame Tests
Write the ionic equation for the precipitation reaction between barium ions and sulfate ions.
- 2Chromatography and Instrumental Analysis
In a chromatography experiment, a dye spot travels 4.5 cm and the solvent front travels 6.0 cm. Calculate its 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
Name the two additional products that can form during the incomplete combustion of a hydrocarbon fuel.
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