Magnetism

Which of these materials does NOT attract a magnet?

• iron

• cobalt

• nickel

• glass

Which statement about magnets is true?

• All magnets have a North and South Pole

• All magnets are the same shape and size

• Magnets can attract all materials made from metal

• All of the above

Which of these can be turned off and on?

• Bar magnet

• Permanent magnet

• Electromagnet

• Horseshoe magnet

How can you make an electromagnet stronger?

• Replacing the iron core with a copper one

• Wrapping the wire around the iron core more times

• Replace the copper wire with a metal wire

• Putting a switch in the electric current

Sara wants to use a magnet to attach a ribbon to her bike. Should she use an electromagnet or bar magnet?

• electromagnet- because it is permanent

• electromagnet- because it is attracted to steel

• bar magnet- because it is stronger than an electromagnet

• bar magnet- because it is permanent

Temporary magnets are made from ________ metals

Permanent magnets are made from _______ metals

Which of the following are examples of temporary magnets

• Bar magnets

• Paperclips

• Nails

Any object that produces a magnetic field

• Wire

• Current

• Metal

• Magnet

Magnetic field lines go from

• North to South

• South to North

• West to East

• East to West