5.4 Electricity Unit Review

A fifth-grade class constructed this circuit. Which item below would cause the light to glow when connected from point X to Y?

• Piece of Yarn

• Cotton Ball

• Eraser

• Metal Coin

A(n) _____________ circuit will NOT conduct electricity.

• series

• parallel

• open

• closed

A series circuit consists of four light bulbs. If the first light bulb burns out, what will MOST likely happen to the other light bulbs?

You and a friend each want to design an electromagnet that will pick up the most paper clips. You have all the materials you need: a battery, iron nail, copper wire, and a bit of electrical tape to protect your hands when you hold it. How will you connect the wire from the battery to the nail?

• Wrap the wire around the battery in loose coils and attach one end to the iron nail.

• Wrap the wire around the nail in tight coils and attach one end to one pole of the battery.

• Wrap the wire around the nail in loose coils and attach one end to one pole of the battery.

• Wrap the wire around the nail tightly and attach both loose ends to the poles of the battery.

To make an electromagnet, a conductor should be coiled around _____.

• a glass tube

• a roll of paper

• an iron nail

• a wooden stick

Bits of paper are attracted to the surface of this balloon. What attracts the paper pieces to the balloon?

• Magnetism

• Friction

• Static Electricity

• Kinetic Energy