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Energy
Is the ability to do work
Kinetic energy
Energy of motion
Potential energy
Energy that is stored due to an objects position.
Joules
Energy is measured in
gravitational potential energy
Is the energy stored in raised objects.
Chemical Energy
Is the energy stored in the bonds of molecules. e.g. food, fuels and batteries.
Sound Energy
The energy from a vibrating object
Nuclear Energy
Energy that is stored in the nucleus of an atom
Electrical Energy
Energy caused by the movement of electrons.
Law of Conservation of Energy
Energy is neither created nor destroyed but can be changed from one form to another.
Energy Transformation
Takes place when energy changes from one form into another form.
Renewable Energy
Sources of energy that do not run out. They are easily replenished.
Non-renewable Energy
Resources/Energy that cannot be replaced once it is used. E.g It takes 1000's of years to replace fossil fuels.
solar energy
energy from the sun
wind energy
Energy generated from the kinetic energy of moving air
hydroelectric energy
electrical energy produced by the flow of water
fossil fuels
Coal, oil, natural gas, and other fuels that are ancient remains of plants and animals.
fuel
a material that releases energy when it burns
A sankey diagram
A diagram that represents energy transfers by arrows. The width of each arrow depends on the amount of energy it represents.
Formula to calculate energy use
work = force x distance
Dissipated Energy
Energy that is converted to a non-useful form of energy.
Formula for calculating % efficiency
useful energy output (J) x 100 / Total energy Input (J)
Ways of improving energy efficiency at home..
Insulate walls and attics, use renewable energy sources, Double glazed windows and use efficient appliances.
