We use the half-life of a naturally occurring radioactive form of carbon, 'to date cave paintings and fossils. JON CHASE:'Giving us a chance to almost look back in time.' Science presenter Jon ...

Find out more with BBC Bitesize. For students between the ages of 11 and 14. Changes of state To change the state of a substance, energy must be transferred to or from the substance. Find out more ...

These clips are from the BBC series, Curriculum Collections. Suitable for: KS3 and KS4 / GCSE in England, Wales and Northern Ireland and 3rd Level, National 4 and 5 in Scotland. A scale model of ...