We all need energy to stay alive. We need energy to breath, energy to make our hearts work, energy to make our body move and energy that keeps our body warm. We get this energy from the food that we eat.
We also use energy to do things in our lives. Some of the things that energy helps us to do are: it helps us to see, helps to entertain us, helps to prepare our food and helps us to move.
To help us to see, we need light. To help entertain us, we need sound. To help prepare our food, we need heat. To help us with moving from place to place, we use trains.
Light, sound, heat and 'moving' are all forms of energy. Moving is usually called kinetic energy. All of these forms of energy can be produced using electricity, which is another form of energy. There are other forms of energy, for example, the food that we eat is chemical energy.
It is possible to change one form of energy into another. In our daily lives we frequently use electrical energy to make other forms of energy that we need. This is done using a wide range of pieces of equipment. For example, electricity can be used to make light using a torch or a light bulb in our homes. Sound can be produced using electrical bells, buzzers or speakers. We use electricity to help prepare our food using such things as kettles, ovens and toasters. Most long underground trains use electricity to make them move.
Here are a few examples of how some everyday objects change electricity into another form of energy that is useful to us. Click on the items for more information on how they work.