Magnetism

Magnetism is a type of ____________

• force
• book
• plant
• animal

When two magnets repel, they ________________

• change color
• pull together
• push apart
• get colder

What do magnets stick to?

• copper
• wood
• iron
• plastic

Two north poles will attract.

• True
• False

A north pole and a south pole will attract.

• True
• False

Which component provides the stored energy to run the electromagnet?

• d cell
• core
• coil
• wire

You are making an electromagnet and can choose from a copper, iron or steel rivet.  Which sentence is true?

• You can use all of them because they are all made of metal
• You can use either iron or steel.
• You can only use the iron rivet.
• You can only use the copper rivet.

Bob made an electromagnet but it was very weak.  How can he make it stronger?

• take away a d-cell
• wrap the wire loosely
• use thicker wire
• use less winds

Tim made an electromagnet with one d-cell and wrapped an uninsulated wire 30 times.  It did not work.  How could he fix it?

• wrap the wire more times
• include a switch
• use insulated wire
• use another d-cell

Where does electricity flow in an electromagnet?

• through the insulation
• through the rivet
• through the air
• through the closed switch