Biology: Energy
Energy is defined as the power poses to buy our body, organism, object or matter that allows it to perform some work. In other words, energy is defined as power of doing work. Human beings and other species that are living or non-living require energy in order to perform various activities.
Energy can be changed from one town to another but it cannot be created or destroyed. The law of conservation of energy keeps the total amount of energy in the universe constant. The total amount of energy that was present on the earth before existence of life has never increased or decreased but is still threatened in the same quantity. Anything living or dead possess some amount of energy in one or the other form.
There are different types of energy in the universe. Potential energy and, mechanical energy, chemical energy, kinetic energy, hydel energy, etc are some of the common forms of energy. Even an object that is lying on the ground stores an amount of potential energy in it. When you lift the object or move the object, its potential energy is changed into kinetic energy. We make the use of one form of energy in order to produce the other form of energy. Waterfall in from a height possesses great amount of kinetic energy and when it falls on the water turbine, it rotates it and produces electricity. Human being has invented new ways of transferring one form of energy into another form of energy.