1. You have 2 minutes to play with your magnets.
Do now!
You have 2 minutes to play with your magnets.

2. What do you need to know about magnets?

3. ALL magnets have two poles
NORTH seeking pole
SOUTH seeking pole

4. Breaking a magnet produces two magnets!

5. Opposites attract!

6. Opposite poles attract and like poles repel

7. Magnetic materials

8. Magnetic materials
Iron (steel), Cobalt and Nickel

9. Magnetic induction

10. Magnetic induction
When a magnetic material is close to a magnet, it becomes a magnet itself
We say it has induced magnetism
magnet S N N S

11. Hard and Soft Magnetism

12. Soft Magnetism Pure iron is a soft magnetic material
It is easy to magnetise but loses its magnetism easily
before
after N S S N N S N
Not a magnet
Iron nail

13. Hard Magnetism Steel is a hard magnetic material
It is harder to magnetise, but keeps its magnetism (it is used to make magnets!)
before
after S N S N N S N N
It’s a magnet! S
Steel paper clip

14. I wonder if this is a magnetic field?
Magnetic fields
I wonder if this is a magnetic field?

15. Magnetic fields
Magnets (and electric currents) produce magnetic fields around them.
In the magnetic field, another magnet or magnetic material will experience a magnetic force.

16. Magnetic field lines
We can represent the magnetic field around a magnet using field lines.

17. Magnetic field lines
The arrows show the direction a compass needle would point at that point in the field.

18. Magnetic field lines
The arrows show the direction a compass needle would point at that point in the field.
The closer the field lines are, the stronger the magnetic force felt

19. Field around a bar magnet

20. Earth’s Magnetic Field
Remember the North of a compass needle points to the geographic north pole (i.e. the geographic North pole is a magnetic south pole!) N S

21. Draw the sentence

22. Draw the sentence Magnets ALWAYS have two poles, North and South.
Opposite poles attract, and like poles repel.
Iron (steel), cobalt and nickel are the only elements that are attracted to magnets.
When a magnetic material is close to a magnet, it becomes a magnet itself.
Iron is a SOFT magnetic material;it is easily magnetised but easily loses its magnetism.
Steel is a HARD magnetic material; it is hard to magnetise but keeps its magnetism.
The magnetic field around a bar magnet is shaped like a burger, with lines and arrows going from N to S.
Nottingham is the home of good football.