Magnetism Project

ContentsSection 1 – Magnetic Materials (1minute 34 seconds).

Section 2 - Induced Magnets (3minutes 55 seconds).

Section 3 - Making a compass (4minutes 49 seconds)Section 4 - Magnetic Fields (5 minutes 42 seconds)Section 5 - The Earth’s magnetic field (6 minutes 49 seconds)

Section 6 – Electromagnets (11minutes 43 seconds)Section 7 – Properties of magnets result in different uses (14 minutes 26 seconds).

https://www.youtube.com/channel/UCr7PAv1O8ecQAAtSkIQzFig/videos

File: Science – KS3 – Magnetism – A1-A3. See below for the timings for each section.

StatementTrue or false?

(Start of Module)

True or false?(End of Module)

1Magnets can attract paper, plastic, iron, nickel and aluminium.

2All magnets have a magnetic field.

3All metals are magnetic.

4You can see a magnetic field.

5The Earth is a magnet.

6The strength of a magnet is the same all around it.

7A north pole will attract another north pole.

8A wire carrying a current has a magnetic field around it.

9 Electromagnets can easily be switched on or off.

Task

Complete the last column using T/F to indicate whether the

statement is true or false.

Use the space below each false statement to rewrite it at

the end of the module.

Section 1 - Which of the metals below are magnetic metals? Circle the magnetic metals.

silver (Ag)

Task 2 - Attract or Repel, you decide. Write your answer in the middle boxes.

______________

______________

______________

Write your answer here.____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Answer the question…

Section 2 - Describe the difference between a permanent and induced magnet.

Write your answer here.________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Section 3 – Making a compass

Watch the following video: https://www.youtube.com/watch?v=QiSp6pGe0w0

(Optional Task) Making a compass. If you have the following items at home, you are able to make a compass. Photos on the next page will help you.

Equipment – Magnet (Fridge magnet will work), small plate or dish, needle or paper clip that is magnetic (check by seeing if it attracts to your fridge magnet) and a piece of paper.

MAKE SURE YOU HAVE ADULT SUPERVISION BEFORE ATTEMPTING PRACTICAL TASK

Method.

1. Pour some water in the small plate.

2. Place a North and South on a piece of paper.

3. Stroke the paperclip with your fridge magnet but only in one direction.

4. Place the paper into the water.

5. Put the paperclip on top of the paper.

6. Compare against the compass on your phone.

Photo’s of method

Label your paper with North and South

Place paper into water and then needle on top. Leave it for 1 min. Compare against compass on phone, does it match up?

Equipment.Bowl of waterPaperPaperclipFridge MagnetMobile Phone

Remove needle from paper with magnet. Stroke the paperclip in one direction with the magnet

Place paper into water and then paperclip on top. Leave it for 1 min. Compare against compass on phone. Is there a difference?

What happened in your experiment? Write here___________________________________________________________________________________________________________________________________________________________________________________________________________

Section 3 – Advise Bear Grylls...

Bear Grylls has been stranded in an area he doesn’t know, all he knows is that if he heads North he will find a town. He doesn’t have a compass or his phone. All he has is the magnet inside his headphones, a hair pin that will be attracted to the magnet. He is by a still pond and under a tree with small leaves.

What would you advise Bear to do?

Write your answer here.________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Section 4 - Magnetic Fields

Watch the following video

https://www.youtube.com/watch?v=dPJIMUjXnNA (watch to 1 minute 18)

Don’t forget, field lines always go from North Pole to South Pole

Recap - A magnet is a material or object that produces a magnetic field.

This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other magnetic materials.

Section 4 - Draw the field lines on this magnet. Use the insert curve function in the tool above, or draw a picture on paper, photograph and upload.

TOP TIP. DON’T FORGET YOUR ARROWS

1. A magnetised piece of steel can be used in .......

A compass

A computer mouse

A remote control

A watch

2. If a north and a south pole are near each other ..…..

Nothing will happen

They will attract

They will be demagnetised

They will repel

3. Which one of the following groups of metals are attracted to a magnet?

Copper, nickel, steel

Gold, nickel, iron

Gold, steel, copper

Steel, iron, nickel

4. If two north poles are near each other .…...

Nothing will happen

They will attract

They will be demagnetised

They will repel

5. Which of the following metals is NOT magnetic?

Cobalt

Copper

Iron

Nickel

Section 4 - Complete the sentences by underlining the correct ending. The first one has been done for you.

6. The stronger a magnet .......

The harder the metal

The larger the magnetic force

The smaller the magnetic force

The softer the metal

7. When a magnet is suspended ..…..

It will line up in E-W direction

It will line up in N-S direction

It will not move

It will point up-down

8. The area around a magnet is called a .......

Magnetic area

Magnetic field

Magnetic force

Magnetic space

9. The ends of a bar magnet are called .......

East and west poles

North and south poles

North poles

South poles

10. To show the magnetic area around a magnet we use .......

Aluminium powder

Copper filings

Iron filings

Pepper

Why is it important that the earth has a magnetic field around it?

What are the poles on a bar magnet named?

What is a solar wind?

Where do the charged particles from the Sun enter the Earth's atmosphere?

Why can we see a glow or florescence coming from the aurora borealis?

Section 5 - Answer the Questions:

Why does the electromagnet on the right hold more paperclips than the one on the left?________________________________________________________________________________________________________________________

Section 6 - Electromagnets

Answer the questions 1. Describe the trend which the graph

shows___________________________________2. Which is the anomalous result?___________________________________3. Use the information in the graph to estimate how many paper clips will be held with 80 turns____________________________________________________________________________________________________________________________________________

Nu

mb

er o

f p

aper

clip

sTask 2

Section 7 - Trapped on a desert islandThe following five items need a magnet for them to work properly.

• Speakers

• Headphones

• Electrical Generator

• Mobile Phone

• Electric toothbrush.

You only have one magnet, so you can only use one device. You cannot change your device. Which one would you choose and why?

Extension, if you could choose one other device that needs a magnet, what would it be?

Write your answer here.__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Section 7 - Business task. Your job is to make a choice on which magnet a new recycling business should use. Choose either a permanent magnet or an electromagnet.

Use the information on the uses of magnets to help you. You must give your reasons as to why you have made your decision by comparing the advantages and disadvantages of both types of magnet.

Write your answer here.__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Section 7 - Below is an electromagnetic door lock which is used to control entry to an important research area. The scientists who are trying to get into the area are struggling to open it as the magnet isn’t strong enough. Answer the questions to help the scientists

1. How does the iron core become magnetised?

________________________________________________________

2. What happens to the iron bolt when the iron core is magnetised?________________________________________________________

3. How could the scientists increase the strength of the Iron core to open the door?____________________________________________________________________________________