Which statement describes the conservation of energy in a closed system?
The total energy increases whenever energy is transferred between different stores.
The total energy remains constant, but it can be transferred between different stores.
The total energy decreases because some energy is always destroyed during transfers.
The total energy remains constant only if no energy transfers take place within the system.
82 exam-style questions on Edexcel GCSE Physics 3.1 Energy stores and calculations. Each one has a worked solution and a mark scheme showing where the marks go.