Energy is the capacity for doing work. Nearly all physical and chemical changes in nature involve the absorption or emission of energy.
There are two general types of energy, potential and kinetic:
Potential Energy: is the energy of position or can be considered as stored energy ready for use.
Kinetic Energy: is the energy of motion or movement.
Energy is moved between or from potential to kinetic to potential. A common form of energy is heat. Heat is energy that is transferred from one body to another because of a temperature difference.
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