4th grade Electricity

In which of these circuits will the light bulb turn on?

• A
• B
• C
• D

Magnets stick to ____

• Plastic
• Other magnets
• Iron or Iron Alloys
• Both Magnets and Iron/Iron Alloys

The path through which electricity flows is called a _________.

• Trail
• Circuit
• Receiver
• Power Source

Which of these materials would be considered an excellent energy conductor?

• Copper wire
• Plastic straw
• Wooden clothes pin
• Pillow

An insulator is a material that _______.

• produces heat and light.
• does not easily allow the flow of electricity.
• is expensive.
• connects batteries to wires in a circuit.

Which would be most useful to find out whether a material is a conductor or an insulator?

• connect the material into an electric circuit
• draw the material into the shape of a wire

Why are the wires in electric circuits often coated with plastic?

• the plastic carries the electric current
• The plastic keeps the electric current inside the wire

Which of the following groups of materials make the best insulators?

• rubber, glass, plastic
• copper, plastic, gold

Why is it important to make sure that electric cords are covered in plastic?

• plastic is a good insulator
• plastic is a good conductor

which of these materials is a conductor?

• rubber
• chalk
• gold