Energy

Five forms of potential energy are:

1. A door when it is closed. 2. A ball when it is in someone's hand. 3. A car when it is turned off. 4. A light bulb when it is turned off. 5. An aeroplane when it is parked in the airport.

Five forms of kinetic energy are:

1. A door when it is being opened. 2. A ball when it is being thrown. 3. A car when it is driving. 4. A light when it is turned on. 5. An aeroplane taking off, landing or flying.

1. A candle is a light source. 2. Light travels much more quckly than sound. 3. Cars headlamps give straight beams of light. 4. Stars are a light source. 5. The sun is a light source. 6. All living things depend on light.