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Atom   Smallest particle of an element that has the properties of that element. Consists of a nucleuscontaining a proton, neutron, and electrons orbiting the nucleus.  
Protons   Positively charged particle that is part of an atom’s nucleus  
Electrons   Negatively charged particle that is found outside the nucleus of an atom.  
Electricity   Charge, negative or positive.  
Electric Field   Volume of space around a charge (or object) where electric force is exerted on othercharges (or objects)  
Contact Electrification   Creating a charge imbalance by the contact of two different insulating surfaces Friction,which means rubbing, is one example of contact electrification.  
Conduction   Creating charge imbalance within an object touches another object causing the transfer ofelectrons from one object to the other. Requires direct contact.  
Induction   Creating a charge imbalance within an object that is caused by the presence of th electricfield of another object.  
Law ofConservationof Charge   If a negative net charge is created, an equal but opposite net is charges is also created. Charge is neither created not destroyed.  
Current   The flow or movement of charge. Slow, about 8.5 cm/hour.  
Circuit Diagram   Arrangement of symbols used to represent components of a circuit.  
Short Circuit   A circuit containing no resistor.  
Circuit   Complete path through which current can flow.  
Resistance   Measure of how difficult it is for charges to flow through a material.  
Resistor   Device that resists the flow of charge. Extracts energy from the circuit and slows downcurrent flow.  
Conductor   Material that contains moveable charge. Electrons exist in a moveable sea.Analogy to a water filled pipe.  
Insulator   Material in which charges are relatively immobile.Analogy to ice filled pipe.  
AC Alternating current circuit.   Circuit in which current alternates the direction in which it flows.  
DC Direct current circuit.   Circuit in which current flows in only one direction.  
Voltage   Difference in electric potential energy.Results from the differences in net charge between two points in an electric field. Providesthe “push” for electric current to flow. Generated by energy sources such as batteries andgenerators.  
Cell   Causes electric charge to flow (due to voltage of the cell). Does not create charge.  
Battery   Two or more cells in series.  
Electrode   Conductor through which current enters/leaves a battery or cell  
Electrolyte   Liquid or paste where the electrons flow.  
Series   Electric circuit with a single path.  
Parallel   Electric circuit with multiple paths or branches.  


   


 

 

 

 

 

 
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