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What is electricity?

matter with an electric charge

All matter is made up of


When electrons are separated from their atoms, the atoms become



hold electrons tightly

Examples of Insulators

Rubber, plastic, wood, glass, dry air


allow electrons to flow

Examples of Conductors

metal and water

Like charges


Unlike charges


Definition of Static Electricity

The imbalence of positive and negative charges

Characteristics of Static electricity

Results from the movement of electrons; affected by the material; after discharge does not flow; the shock is from the fast movement of electrons (causes warming of air)

Examples of Static Electricity

Slides, trampolines, lightening, clinging laundry, doorknob shock

Not an Example of Static Electricity

Electricity that flows in an outlet

Lightening is

a large discharge of static electricity

Lightening is caused by

friction of the movement of water droplets in a cloud build up areas of (+) and (-) charges

Lightening bolt occurs when

billions of electrons are transfered at the same rate

The heat from the bolt causes

the air around it to expand rapidly to produce compression waves (thunder)

What do lightening rods do?

they ground the charge

The lightening rod sends the charge to

the earth


a device you can use to determine the charge of an object as well as the magnitude of the charge

Current electricity is made by

generators (gathers electrons)

Current electricity forces electrons to move through a


Direct Current

electrons flow in the same direction all the time

Example of Direct Current


Alternating current

electrons flow changes directions

Example of Alternating Current

outlets in your home

Def. of circuit

the path taken by the electric current

Circuit needs to be two way or ------ circuits or it will not work


Parts of a Circuit

Source of electricity, conductor (wire), load (resistor), switch (optional)

Series circuit

a single current flows through the path and all devices connected to the path

Example of Series Circuit


When more resistors are added to the series circuit the overall current with the circuit ----- (resistance ----)

decreases increases

Parallel Circuit

as the number of resistors increases the overall current stays the same

If one load of the parallel circuit goes out

the rest stay on

Amperes measures

electric current

Volts measures

amount of push a source of electricity gives

Watt measures

how much energy something uses


used to measure current


a property of some materials in which there is a force of repulsion or attraction between certain like and unlike poles

Magnets are attracted to

iron and metals the contain iron

Magnetic Field

a region around a magnet where magnetic forces act

When electricity flows through a wire it makes a ------- ---- around the wire

magnetic field


a strong temporary magnet made by inserting an iron core into a wire coil and passing an electric current through the coil

The more wire around the iron the ----- the magnet


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