A student is investigating the energy changes in a closed system. Which statement about the energy in the system is correct?
energy is created inside the system each time a change happens
energy is transferred between stores but the total stays the same
energy is destroyed inside the system each time a change happens
energy leaves the system every time a change happens inside it
40 exam-style questions on AQA GCSE Physics 1.2 Conservation and dissipation of energy, covering 1.2.1 Energy transfers in a system and 1.2.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.