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Unit 5:Energy

Energy The ability to do work or cause a change.
Law of conservation of energy Energy cannot be created or destroyed, it can only be transferred.
Open system A system that continuously interacts with its surrounding.
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 negatively charged particle located on the outside the atom's 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 electric 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= λf
Wave A disturbance that transfer energy from one place to another without requiring matter to move the entire distance.
Created by: Varsha_Bala_22



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