Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
- 1Energy Changes
A reaction profile shows the reactants at 150 kJ and the peak (activation energy point) at 195 kJ. Calculate the activation energy.
- 2Exothermic and Endothermic Reactions
State the energy transfer that occurs during an endothermic reaction.
- 3Bond Energies, Cells and Fuel Cells
State the two substances that react inside a hydrogen fuel cell.
- 4Rate and Extent of Chemical Change
State what is meant by a catalyst.
- 5Rates of Reaction
Explain why using a light sensor and data logger is more reliable than timing by eye in the disappearing cross practical.
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Every sheet is deterministic: the same date always regenerates the same five questions. All of June 2003, including the monthly compilation PDF.