View
212
Download
0
Category
Preview:
Citation preview
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
Recommended