Which of these is a natural product that has been replaced in many of its uses by a synthetic product?
Limestone, which is used in many buildings as cement
Sand, which is used in many windows in the form of glass
Iron ore, which is used in many bridges in the form of steel
Cotton, which in many clothes has been replaced by polyester
40 exam-style questions on AQA GCSE Chemistry 10.1 Using the Earth's resources and obtaining potable water, covering 10.1.1 Using the Earth's resources and sustainable development, 10.1.2 Potable water, 10.1.3 Waste water treatment, and 10.1.4 Alternative methods of extracting metals. Each one has a worked solution and a mark scheme showing where the marks go.