Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
13th October 2017
- 1Energy Changes
A reaction profile shows the reactants at 220 kJ and the products at 340 kJ. State whether the reaction is exothermic or endothermic.
- 2Exothermic and Endothermic Reactions
State what is meant by the activation energy of a reaction.
- 3Bond Energies, Cells and Fuel Cells
State whether forming a new chemical bond requires energy or releases energy.
- 4Rate and Extent of Chemical Change
State the four factors that can increase the rate of a chemical reaction.
- 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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