The law of conservation of energy states that it is impossible to create or destroy energy because energy can only be transformed from one form to another or transferred from one body to another (Shipman, Wilson, & Todd, 2009). Therefore, the amount of energy contained in a system remains constant even if some of it is converted to other forms. Kinetic energy is contained in moving bodies while potential energy is contained in motionless bodies. The amount of kinetic energy in a body is affected by environmental factors and the state of surrounding bodies while potential energy is independent of the surroundings (Viegas, 2005). For instance, friction can reduce the amount of energy contained in a moving body because some of the energy is converted to heat energy. In addition, energy is also used to overcome the force of gravity. Several activities explain the concept of energy conversion and transfer from one body to another.

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