Energy Reference Material
Helpful references for further study:
A revision book for Key Stage 2 which contains the facts that children of this age need to know. It is well set out and the author has a sense of humour!
A useful Web site: The Centre for Renewable Energy and Sustainable Technology - an information service which provides many links to other, related sites.
The Law of Conservation of Energy says that energy cannot be created or destroyed. In that case, what happens when a battery becomes flat? Where has the energy gone? Where did the energy in the battery come from?