Electricity

Front

What materials are necessary to complete a simple circuit to turn on a bulb?

Back

Battery, wire, and bulb

Front

Which of the following is the best example of static electricity?

• clothes getting stuck together in a dryer
• a light bulb turning on with a switch
• a doorbell ringing when it is pressed
• using a computer to search the internet

Back

clothes getting stuck together in a dryer

Front

Example of human-harnessed electricity:

Lightning striking a building

,

Getting a small shock when touching a doorknob

,

A hydroelectric dam

,

Socks sticking together in a dryer

Back

A hydroelectric dam

Front

What could be done to make the buzzer work in the electrical circuit?

Back

Close the switch to make a complete circuit

Front

What object could be placed in the open space to act as a conductor and complete the circuit? Options: penny, toothpick, eraser, crayon

Back

penny

Front

What is one disadvantage to having an electromagnet?

Back

An electromagnet needs a power source to operate.

Front

Why would cranes in a junk yard use an electromagnet instead of a permanent magnet?

Back

Because the electromagnet can be turned on and off

Front

Where is the magnetic field the strongest in a magnet with iron filings on a piece of paper?

Back

The magnetic fields are strongest at the poles.

Front

What change will still allow a magnet to attract an object through a material?

• The magnet is moved much farther away from the glass.
• The glass is replaced by a piece of paper.
• The nail is replaced with a plastic spoon.
• The glass is replaced with a thick piece of wood.

Back

The glass is replaced by a piece of paper.