The movement of vehicles, light from lamps and sound from musical instruments; all of them occur because of energy. Therefore in simple terms, energy is the ability to make things happen. All life on the earth depends on energy, of which huge amount comes from the sun. Sun transmits energy in the forms of waves to earth as heat (infrared or heat radiation) and light. Sun’s energy makes plants grows, which provide food that people and animals eat.
Energy cannot be created or destroyed. It can only change from one form into another. For example, in the power stations oil and coal turns their stored chemical energy into heat energy which boils water. Turbines change this heat energy of the steam into electric energy which come to our homes, offices, factories etc. The energy flow from power house (left) to our home (right) is shown in Figure 1 below.
The movement of vehicles, light from lamps and sound from musical instruments; all of them occur because of energy. Therefore in simple terms, energy is the ability to make things happen. All life on the earth depends on energy, of which huge amount comes from the sun. Sun transmits energy in the forms of waves to earth as heat (infrared or heat radiation) and light. Sun’s energy makes plants grows, which provide food that people and animals eat.Energy cannot be created or destroyed. It can only change from one form into another. For example, in the power stations oil and coal turns their stored chemical energy into heat energy which boils water. Turbines change this heat energy of the steam into electric energy which come to our homes, offices, factories etc. The energy flow from power house (left) to our home (right) is shown in Figure 1 below.
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