ENERGY INTRO

Energy is the capacity to do work. We cannot ‘see’ energy, but we can feel the effects of energy. Energy can neither be created nor destroyed; it can only be transfer from one form to another form. For example, we change chemical energy to heat or from wind energy to electrical energy. Without energy, human cannot do anything as we eat to obtain energy to carry out activities such as walking and breathing. Therefore, energy is very important for all the living things to survive.

We can classify energy into renewable energy and non-renewable energy. Examples of renewable energies are solar energy and wind energy while non-renewable energies are natural gas and petroleum. Since we depend on non-renewable energy to carry our daily activities like for vehicles moving therefore we need to do find an alternative energy resources to replace the non-renewable energy so that we will not suffer from the effects of energy shortage.