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Kinetic energy definition
The energy an object has because it is moving
Gravitational potential energy definition
The energy an object has because of its position
Elastic potential energy definition
The energy stored in a springy object when you squash or stretch it
Thermal energy definition
The energy a substance has because of temperature
Chemical energy definition
The energy stored in fuels, foods and batteries
Conservation of energy definition
Energy cannot be created or destroyed, only transferred
Work done definition
The energy transferred by a force
Dissipation definition
The process of energy being transferred or lost to the surroundings
Friction definition
A force that opposes movement
System definition
An object or group of objects
Closed system definition
An isolated system where no energy transfers take place into or out of the energy stores in the system
Useful energy definition
Energy in the place it is wanted in the form that it is needed in
Wasted energy definition
Energy that is not usefully transferred, usually as thermal
Energy transfer pathways
Heating
Waves
Electric current
Force when it moves an object
A falling object:
Decreases GPE store
Increases KE store as falls
Waste energy transferred as thermal and sound
Carbon neutral definition
A process by which no extra carbon is released to the atmosphere
Machines waste energy…
Due to friction between moving parts, air resistance, electrical resistance and noise
Note 
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