Year 4 - Science - Electricity

Which group of materials make good electrical conductors?

• Metals

• Plastics

• Fruits

• Woods

Which of these materials is an electrical insulator?

• Copper

• Steel

• Glass

• Aluminium

Which components would you need to make a circuit which turns a bulb on and off?

• Bulb & holder

  Wires

  Switch

  Bulb & holder

• Bulb & holder

  Wires

  Cell & holder

  Buzzer

• Cell & holder

  Buzzer

  Switch

  Bulb & holder

• Bulb & holder

  Cell & holder

  Wires

  Switch

For a circuit to work it must be:

• Incomplete

• Powerful

• Complete

• Large

Which of these devices would usually be powered by electrical cells? (Tick two).

• Mobile phone

• Torch

• Desktop computer

• Television (T.V.)

Which of these devices would usually be powered by mains electricity? (Tick two).

• i-pad

• Electric oven

• Remote-controlled car

• Hairdryer

What is an electric socket?

• A pair of electrically heated socks

• A place in a wall where you can plug in electrical devices to get power

• A machine that generates electricity

• Something that doesn't conduct electricity

What material are electrical wires made from?

• Red plastic

• Black plastic

• Metal covered in coloured plastic

• Thin plastic tubing

What is an electrical cell?

• A device which stores electricity

• A device which makes electricity

• A device which uses electricity

• A device which destroys electricity

Why was Nikolai Tesla important?

• He invented the best electric lightbulb

• He invented the best way to send electrical power over long distances

• He invented the best way to make cheap electricity

• He invented the best way to power televisions by electricity