Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
12th October 2025
- 1Chemical Analysis
Name the gas that relights a glowing splint.
- 2Tests for Ions, Gases and Flame Tests
State the flame test colour for sodium ions.
- 3Chromatography and Instrumental Analysis
State one advantage of running known reference substances alongside an unknown sample on the same chromatogram, rather than only comparing to published Rf values.
- 4Chemistry of the Atmosphere
Name three greenhouse gases.
- 5The Atmosphere: Evolution and Greenhouse Gases
Explain, in terms of gas molecules, why methane and water vapour, as well as carbon dioxide, are described as greenhouse gases.
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