Show:
Magnetism
Electricity
Circuit
Conductors and Insulators
Electromagnets
100
What would happen if the north ends of two magnets were close together?
What is repel?
100
Socks taken from a clothes dryer that stick together or a lightning bolt in the sky are examples of ____________.
What is static electricity?
100

Is a circuit open or closed if you haven't turned on the switch?

What is open?

100
What is a material that lets electric current pass through?
What is a conductor?
100

True or False: An electromagnet is a permanent magnet.

What is False? An electromagnet can be turned on or off. Once the circuit is broken, the magnetism is lost.

200
If a south end of a magnet is close to a north end of a magnet, the magnets will _________.
What is attract?
200

What is a short circuit? Why do they happen?

Short circuits happen when a poorly built circuit sends too much voltage because no load is there to use some of the voltage. They can also happen when a wire comes loose or when a circuit isn’t built with a load.

200

What supplies current to an electrical circuit?

What is a battery (or other electrical source)?

200
What is a material that blocks an electric current from passing through?
What is an insulator?
200

True or False: An electric crane is an example of an electromagnet.

What is True?

300

True or False: Magnets are the strongest in the middle.

What is False?

300

What function does a switch play in a circuit and why is it important?

It opens and closes the circuit- turning off and on the power and saving the energy of the battery and the load.

300

What part of a circuit does electrical energy change from one form to another?

What is a load (lightbulb)? This is where the energy changes to produce heat or light. Other answers may include a motor or a speaker.

300
Which of these materials is not a conductor: copper, aluminum, gold, or wood?
What is wood?
300

True or False: A refrigerator magnet is a permanent magnet.

What is True? Even when you take it off the refrigerator, it is still magnetic.

400
True or False: All magnets have a north and south pole.
What is True?
400

Why is static electricity dangerous?

Lightning can cause burns and can even kill animals. Electric shock also can be dangerous – stopping your heart, causing burns, or causing death.

400
True or False: When you turn on a light, the switch is opening the circuit.
What is False? A switch closes the circuit to turn on the light.
400
Which of these materials is a conductor: rubber, glass, air, silver?
What is silver?
400

An electromagnet has many advantages: name one!

- turn on and off

-increase power

-turn something into a magnet

500

Explain- why is Earth considered a magnet?

It has 2 poles (north and south) and has magnetic properties and magnetic force.

500

What unit of measurement do we measure electric current in?

What is kilowatts

500

An electrical circuit is made up of a connector (wire), a load (lightbulb), a switch, and a ____________.

What is a battery (or electrical source)?

500

Name one good conductor and one good insulator

Examples could include:

Conductors- metal, silver, gold, water

Insulators-Rubber, plastic, wood, glass

500

You can make an electromagnet using what three items?

What is an iron bar (nail), battery, and a wire?