Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
- 1Energy Changes
Give one everyday example of an endothermic process.
- 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
A tangent drawn to a volume-time graph at 15 seconds passes through the points (5 s, 6 cm3) and (25 s, 66 cm3). Calculate the rate of reaction at 15 seconds.
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