An investigation into the use of fossil fuels and their impact on the environment. Most of the energy we use in Britain comes from fossil fuels. Oil, gas and coal are burned to give us energy. This also produces carbon dioxide and sulphurous and nitrous oxides that can lead to air pollution and acid rain.
As a follow-up activity, test tap water with universal indicator to show it is neutral. Burn sulphur in a gas jar on a deflagrating spoon and quickly add a glass lid. Add water through a small gap then seal and let some of the sulphur dioxide produced dissolve. Test the solution with universal indicator to show the water has become acidic. Grow trays of cress watered with different dilutions of acid to show the effect of acid rain on plants.