Electricity

Electricity and Magnets

Electricity 1

Electricity 2

Magnets 1 Magnets 2 Random

10 10 10 10 10

20 20 20 20 20

30 30 30 30 30

40 40 40 40 40

Final Question

10

When Two objects have different electric Charges, they… Start a fire. Pull together. Push apart. Fall to earth

Pull together

20

The purpose of insulation on an electric wire is to… Make the electric

current stay on its path

Heat the wire and generate energy

Resist the flow of electricity and light up

Close the circuit and make electricity flow

Make the electric current stay on its path

30

Which of these substances is the best conductor of electricity?Air RubberPlasticMetal

Metal

40

Electric current will flow through a circuit as long as the…Switch is openCharges are equalPath is unbrokenWires are insulated

Path is unbroken

10Which statement about

a parallel circuit is correct?Each appliance or light

has its own electrical path

If one bulb is removed, the circuit will not work

The power source is always an electromagnet

Only one appliance or light ma be used at a time

Each appliance or light has its own electrical path

20Frayed or broken

insulation is dangerous because it can…Prevent electricity

from flowing Turn a parallel circuit

into a series circuitCause the power to

be cut offCause a fire or

electric shock

Cause a fire or electric shock

30

A magnet is anything that…Has positive and

negative chargesCan pull iron and

steel toward itCan create

electricity Is present in the

earth’s crust.

Can pull iron and steel toward it

40

If a magnet is allowed to swing freely, the north-seeking pile will point…UpDownNorth South

North

10The northern lights

are caused when The earth’s magnetic

poles change placesCharged particles

form a pattern around the earth’s magnetic poles

Electric power is generated from nuclear energy

The sun’s energy becomes too intense and burns the forest in the far north.

Changed particles form a pattern around the earth’s magnetic poles

20Electric current can be

generated by…Harnessing the

magnetic energy in the earth’s atmosphere

Attaching a compass to a lodestone

Sliding a magnet back and forth through a coil of wire

Capturing the flow of electricity with a meter

Sliding a magnet back and forth through a coil wire

30

An electromagnet is created when ______ flows through a wire coil.Poles ElectricityNegative chargeA magnetic field

Electricity

40

When you push the button on a doorbell, you are _______ a circuit.Opening BreakingFixingClosing

Closing

10

As you rub a balloon on your sleeve, it picks up a ___________.Negative chargeMagnetic fieldPositive chargeElectric circuit

Negative Charge

20

Current flows through an electric circuit as long as the path is _________.BrokenClosedUnbrokenOpen

Unbroken

30

If you sprinkle tiny pieces of iron over a magnet, the pattern formed shows a ___________.Electric circuitMagnetic field Power sourceElectricity

Magnetic field

40

Magnetic force is strongest at a magnet’s ________.Power sourcePoles Magnetic fieldElectric circuit

Poles

10

Electric generators have huge electromagnets plus a __________.Magnetic field Negative chargePower source Electric circuit

Power source

20

Electromagnets are useful because they can be turned on or off by opening or closing an ____________.Switch Magnetic fieldPoles Electric circuit

Electric circuit

30

When two objects have different electric charges, they ______ each other.Attract ClosePull awayOpen

Attract

40

In a _________ circuit, each appliance or bulb has its own path for electricity to reach it.Single DoubleParallelElectric

Parallel

Final QuestionExplain why electro

magnets are used in many electric appliances?

They are useful because they can be turned on and off. When closed the appliance operates and when open, it stops

End of Show