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Energy The ability to do work or to cause change
Law of conservation of energy Energy cannot be created or destroyed, it can only change forms or be transferred
Open system A system that continuously interacts with its surroundings
Closed system A system that can exchange energy, but not matter, with its surroundings.
Electricity The continuous flow of electric charges through a conductor
Electron A nedatively charged particle located outside the atoms nucleus
Electric circuit A closed path through which an electric current flows or may flow
Electric current A flow of electric charge
Voltage The difference in electrical potential energy between two places in a circuit
Resistance The measurement of how difficult it is for charges to flow through a material
Electromagnetic spectrum The range of seven types of waves that carry energy as electricity and magnetism
Medium A substance through which a wave travels
Wave speed The speed of a wave is determined when both frequency and wavelength are known S=Af
Wave A disturbance that transfer energy from one place to another without requiring matter to move the entire distance.