Magnetism

Question 1

What is a force?

Answer 1

A push or pull that causes a change in motion

Question 2

What is a force field?

Answer 2

The pattern in space of how that force is felt by other objects

Question 3

What is magnetism?

Answer 3

The phenomena caused by magnets. It is a force like gravity or the attraction and repulsion of electrostatic charges

Question 4

How are magnetic field formed?

Answer 4

By the flowing of electrons

Question 5

What is a magnet?

Answer 5

An object that can attract/repel (exert a force) on other objects containing iron, nickel or cobalt (these 3 metals electrons have the ability to move more freely within the metal)

Question 6

What materials are magnetic?

Answer 6

Ferromagnetic materials:

- Iron, Cobalt, Nickel

Question 7

How many poles do magnets have?

What are they called?

Answer 7

2

North and South poles

Question 8

Where does the North pole of a magnet naturally seek?

Geographic ____

Answer 8

Geographic North

Question 9

Describe relationships between North and South poles of magnets

Answer 9

North and South=attracted
North and North=repel
South and South= repel

Question 10

As distance between poles increases, what happens to magnetic force?

Answer 10

It decreases

Question 11

What causes the Earth’s magnetic field?

Answer 11

Moving molten iron in Earth’s outer core

Question 12

What does the Earth’s magnetic field protect us from/

Answer 12

It shields us from space radiation

Question 13

Geographic South is Magnetic what?

Answer 13

Magnetic North

Question 14

Geographic North is Magnetic what?

Answer 14

Magnetic South

Question 15

What is an example of the poles effects on the Earth

Answer 15

Aurora’s

Question 16

Can you isolate a single pole on a magnet?

Answer 16

No

Question 17

What happens if a magnet is broken into two pieces

Answer 17

It will create two smaller magnets

Question 18

Describe non-magnetic substances

Answer 18

Not attracted or repelled by a magnet (wood, glass, most materials and elements except Iron, cobalt, and Nickel)

Question 19

Describe magnetic substances

Answer 19

Attracted or repelled by a magnet

Question 20

Describe ferromagnetic substances

Answer 20

Attracted by a magnet. It can be magnetized temporarily. Material must contain iron, cobalt, or nickel

Question 21

Ferromagnetic substances must contain what?

Answer 21

One of the following:

• Iron
• Nickel
• Cobalt

Question 22

What are magnetic fields?

Answer 22

The space around a magnet where its forces are felt

Question 23

What can be used to determine the shape of the magnetic field?

Answer 23

Iron fillings

Question 24

What kind of field are magnetic fields (on a single magnet)?

Answer 24

Dipole (bc 2 poles; North and South)

Question 25

Which way do lines point in a magnetic field?

Answer 25

Lines point away from North toward South

N–>S

Question 26

Where do the lines of the magnetic field meet?

Answer 26

The poles

Question 27

Where is the magnetism strongest?

Answer 27

At the poles

Question 28

What can compasses be used to determine determine?

Answer 28

The direction of the lines of force/where the poles are

Question 29

The North end of the compass points to where on a magnet?

Answer 29

The South pole of the magnet (opposites attract)

Question 30

Do magnetic field lines ever cross each other?

Answer 30

No