Downloadable worksheets for AQA GCSE Physics 1.1 Energy changes in a system, and the ways energy is stored before and after such changes, with answers included. Worksheets covering 1.1.1 Energy stores and systems, 1.1.2 Changes in energy, 1.1.3 Energy changes in systems, and 1.1.4 Power, matched to the AQA GCSE Physics (8463) specification and suitable for Foundation and Higher tier. Print or work through on screen.