Definitions

• Conservation of energy = energy cannot be created or destroyed, only transferred from one form to another
• Kinetic energy = energy stored in moving objects
• Elastic Potential energy = the energy stored when an object is stretched or squashed
• Spring constant = a measurement of how stiff an object is
• Extension = Change in length
• Gravitational potential energy = the energy stored in an object at height
• Mass = The amount of matter in an object
• Gravitational field strength = the gravitational force exerted per unit mass
• Specific heat capacity = The energy required to raise the temperature of 1kg of a substance by 1 degree Celcius
• Power = how much energy you have transferred in a given time
• Energy resource = a useful supply of energy
• Renewable energy = energy that is replenished as it is used.
• Non-renewable energy resource = energy resource that cannot be replenished at the same rate as it is used
• Fossil fuel = a non-renewable energy source which is formed from the remains of living organisms over millions of years
• Efficiency = the fraction of energy supplied to a device which is transferred to useful forms of energy
• Density = A measurement of how much mass is in a volume