Magnetism Test

Question 1

What are the building blocks of all matter

Answer 1

Atoms

Question 2

What is the charges of an atom

Answer 2

Electron (-)
Proton (+)
Neutron (0)

Question 3

What are the three metals attracted to a magnet

Answer 3

Iron, cobalt and nickel

Question 4

What metals can be made into magnets

Answer 4

Iron, cobalt and nickel

Question 5

How many poles does a magnet have

Answer 5

2 poles

Question 6

What is a magnetic feild

Answer 6

The imaginary lines around the magnet ( In through the south out through the north)

Question 7

What are the three types of magnets

Answer 7

1. Natural – magnetite, type of rock found in the earth
2. Permanent – made out of metal, stay magnetized unless hit repeatedly or heated- iron, nickel or cobalt
3. Temporary – lose their magnetism very quickly, example electromagnet

Question 8

Explain a compass

Answer 8

Compass is a magnet free to move

• Has a needle made of iron that points towards magnetic North pole
• Can be used to find directions

Question 9

what can magnetism be caused by

Answer 9

Magnetism can be caused my moving electrons (electricity)

Question 10

What is an electromagnet

Answer 10

Electromagnet – using electricity to make a magnet

Question 11

What are the advantages to an electromagnet

Answer 11

1. They can be turned on and off
2. You can reverse the polarity
3. You can vary their strength

Question 12

With magnetic poles…..

Answer 12

Likes repel Opposites attract

Question 13

If you cut a magnet in half what do you get

Answer 13

2 smaller magnets with 2 poles on each

Question 14

What is a domain

Answer 14

the areas of electrons spinning, in a magnet the domains line up

Question 15

What is the Van allen’s belt

Answer 15

the energetic charged particles (plasma) around Earth, which is held in place by Earth’s magnetic field