LIFE AS AN EXPRESSION OF ENERGY CHANGES -
- Energy is explained as capacity of body to do work.
- Energy may be as potential (stored) or kinetic (expended) energy.
- It exists in various forms such as radiant (light), thermal (heat), electrical, mechanical & chemical.
- Free energy is used.
- According to first law of thermodynamics the total amount of energy in any closed system is conserved. It can neither be created nor be destroyed, but it can be transformed from one form to another form.