Magnetism worksheet

A magnet will pick up a nail, but not a penny because the nail

• has rust on it.
• is lighter than the penny.
• has a sharp point.
• contains iron.

When you put ring magnets on a pencil, the magnets stay apart from each other because

• magnets are too weak to stay together.
• material that makes up the magnets aren't magnetic.
• same poles of the magnets are facing each other.
• the pencil stops the force of the magnets.

Magnets will stick to refrigerator doors because the doors are 

• Painted with plastic.
• Made of metal.
• Easy to open. 
• Heavy.

Which is NOT a use of magnets?

• Generating electricity
• Holding cabinet doors closed
• Sorting paper from plastic
• Storing information on computer hard drives.

What is a Natural Magnet known as?

• A. LODESTONE

• B. HAEMATITE

• C. MAGNETITE

• D. B AND C

Where is the the pushing or pulling force of a magnet strongest?

• In the middle of the magnet

• At the ends of the magnet

• Same all the way through the magnet

• none of them

What subatomic particle causes magnetism in an atom? 

• protons
• neutrons
• electrons
• nucleus

How is Earth's magnetic field similar to that of a magnet?

• It's shaped like a horseshoe.

• It has north and south poles.

• It is made plastic.

• It is hundreds of miles long.

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.
• Use a smaller battery.
• Reverse the poles of the magnet.
• Remove all the coils and the nail.

How are electromagnets different from magnets?

• magnets can be turned on/off
• you can turn an electromagnet on/off
• magnets are more powerful
• magnets have a North and South pole