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Specific Learning Outcomes
Specific Learning Outcomes
Define “energy”
state the units of energy.
recognise and classify active and stored forms of energy.
recognise and name different forms of energy (heat, light, sound, kinetic, gravitational potential, chemical potential, elastic potential, solar, nuclear, wind)
state and explain the “Law of Conservation of Energy”
write energy transformation equations.
understand that when devices transform energy, there is useful as well as wasted energy.
understand that in mechanical systems energy is wasted due to friction which produces heat.
Energy Conversion: Transfer and Transform
Energy Conversion: Transfer and Transform
Energy transfer is the movement of energy from one location to another. For example, when electricity moves from a wall plug, through a charger, to a battery.
Energy transformation is when energy changes from one form to another – like in a hydroelectric dam that transforms the kinetic energy of water into electrical energy.
While energy can be transferred or transformed, the total amount of energy does not change – this is called energy conservation.
Law of conservation of energy
Law of conservation of energy
The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside. This is particularly confusing in the case of non-conservative forces, where energy is converted from mechanical energy into thermal energy, but the overall energy does remain the same. The only way to use energy is to transform energy from one form to another.
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