Magnetism

Question 1

What are some characteristics of magnets?

Answer 1

1. They are usually made of iron. 2. They attract some materials. 3. They can also repel other magnets. 4. They have two ends called magnetic poles.

Question 2

What are some types of magnet?

Answer 2

1. Bar magnet. 2. Wand magnet. 3. Doughnut magnet. 4. Horseshoe magnet.

Question 3

In a magnet, same poles _____.

Answer 3

‘repel’.

Question 4

In a magnet, opposite poles _______.

Answer 4

‘attract’.

Question 5

Name four metals that are magnetic.

Answer 5

1. Iron. 2. Nickel. 3. Cobalt. 4. Steel.

Question 6

What is a magnetic field?

Answer 6

The area surrounding a magnet that can exert a force on magnetic materials.

Question 7

What is a magnetic domain?

Answer 7

A microscopic magnet region composed of a group of atoms whose magnetic fields are aligned in a common direction.

Question 8

What is an electromagnet?

Answer 8

A magnet made by wrapping a coil of wire around an iron bar and passing an electric current through the coil.

Question 9

Electromagnets can be _______ __ and ___

Answer 9

‘turned on’ and ‘off’.

Question 10

We can make an electromagnet stronger by…

Answer 10

1. Wrapping the coil around an iron core. 2. Adding more turns to the coil. 3. Increasing the current flowing through the coil.