3.4 Magnets

Multiple Choice

True or False: A magnet is attracting when it pushes objects away from each other.

• True

• False

Multiple Choice

Which way will the magnets move after they are released?

• Towards each other

• Away from each other

• Not enough information

Multiple Choice

True or False: All metals stick to magnets.

• True

• False

Multiple Choice

What subatomic particle causes magnetism in an atom? 

• protons

• neutrons

• electrons

• nucleus

Multiple Choice

Which poles are attracted? 

• north and north

• south and south

• north and south

Multiple Choice

Which poles repel?

• north and south

• south and north

• south and south

Multiple Choice

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

Multiple Choice

Which metals are attracted to magnets? 

• iron, nickel, cobalt

• gold, silver, platinum

• copper, magnesium, aluminum

Multiple Choice

Which is not a property of a magnet? 

• all magnets have two poles

• all magnets have a force of attraction or repulsion

• all magnets are surrounded by a magnetic field

• all magnets can be turned off

Multiple Choice

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.