Key Stage 3 Science Investigation. Aim: The aim is to find out the relationship between the concentration of acid and how it affects the growth of the crest seed. Theory: During the pollution topic, in acid rain, I found out that acid rain contains Sulphur Dioxide. This gas can kill plants. Acid rain can be caused by the burning of fossil fuels. The smoke from factories are carried into the air. It forms when oxides of …showed first 75 words of 791 total…

…showed last 75 words of 791 total…sunlight wasn't the same on each tube. That was the only key factor that may have, made the test go wrong. I encountered some strange results. The weak and strong acid never germinated. I expected the weak acid to grow better than the strong acid. This never happened either. The results were strange, but if I planned the investigation again, I think I could make another test, which might give results that I would expect.