A group of geography students investigated soil infiltration rates in a public park. They hammered a single open-ended metal cylinder 5 cm into the ground, poured in 500 ml of water, and timed how long it took for the water to completely infiltrate the soil. They repeated this test once at five different locations across the park.
Suggest one way that this data collection method could be improved to ensure more reliable or representative results.
102 exam-style questions on AQA GCSE Geography Fieldwork. Each one has a worked solution and a mark scheme showing where the marks go.