Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
28th August 2024
- 1Chemical Analysis
A solid gives a lilac flame test. Name the metal ion present.
- 2Tests for Ions, Gases and Flame Tests
Write the ionic equation for the precipitation reaction between barium ions and sulfate ions.
- 3Chromatography 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.
- 4Chemistry of the Atmosphere
Give two human activities that increase the amount of greenhouse gases in the atmosphere.
- 5The Atmosphere: Evolution and Greenhouse Gases
Explain why the natural greenhouse effect is necessary for life on Earth, rather than being a purely harmful process.
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