Safety
If your toaster is jammed always do this first before fixing it.
Unplug it
lightning, fireflies, static electricity
natural occurring electricity
Where will you find EnerGuide labels?
on all new appliances sold in Canada
What is an open circuit?
A circuit that does not allow a complete path for the electricity so the bulb does not light
Faith made a switch using thumbtacks and a paper clip. If she replaces the paper clip with an eraser, will the bulb light? Why or why not?
It will not light because an eraser is an insulator.
Give two safety rules
don't create an electric octopus
always unplug electric devices before repairing or cleaning
never pull a plug out of an outlet by pulling on the wire
don't run wires under rugs or carpets
never put your finger in an empty socket
always replace a damaged electrical cord
fly kites only in open spaces
never tough loose, hanging wires
never use electrical devices near water
don't climb trees near power lines
only electrical plugs go into a wall socket
paper clips, car keys, scissor blades
conductors
Give two ways that you can be energy efficient
AWV
What is a closed circuit?
A circuit that does allow a complete path for the electricity so the bulb lights
Why are electromagnets called temporary magnets?
Once the electricity is turned off, the object is no longer a magnet
Why is a short circuit unsafe?
It can cause a fire
washing machine, vacuum, toaster
electricity used by humans
Give two reasons why it is important to be energy efficient.
saves money
decreases the use of non-renewable resources
decreases air pollution
Give two ways to create an open circuit.
remove a battery
remove a bulb
remove a wire from the battery
remove a wire from the bulb
How are electromagnets used?
To turn refrigerators, street lights, and hot water heaters on and off at the appropriate times
True or False.
When there is a lightning storm the safest place to be is under a tree.
False
plastic ruler, rubber gloves, wood
insulators
What is the purpose of an EnerGuide label?
to tell the consumer how much energy, on average, an appliance uses in a month or year
Give an example of a resistor in use in our homes.
dimmer switch, stove, iron
Draw a circuit diagram that has the following materials: cell and 3 bulbs.
See board for answer
Why is a battery operated radio better to have in the bathroom than a plugged in one?
A plugged in radio has a continuous flow of electricity and you can be electrocuted whereas a battery operated radio has a finite amount of electricity and you will just be shocked.
cobalt, steel, nickel
materials attracted to magnets
Which is more efficient: an appliance that uses 670 kWh/year OR one that uses 60 kWh per month?
the appliance that uses 670 kWh/year
How does adding a resistor to a circuit affect the lighting of the bulb? Why?
The bulb dims or does not light at all because the electricity is slowed down
Where is the earth's magnetic field the strongest?
At the poles