1. Forces Electricity Waves Example resources: Q&A Marvin and Milo
International Space Station kit
Playground Forces
Bloodhound
Q&A

2. 1. Forces
What is a force?
It is a push or pull

3. What forces can you name?
Contact forces
Forces acting over a large distance
Forces acting over a short distance

4. A. Contact forces: Friction Tension Normal Air resistance Applied
Spring
Normal (a book sitting on a table)
Applied (someone pushing a trolley)

5. B. Forces acting over a large distance:
Electrical
Magnetic
Gravity

6. The Electromagnetic Force
Strength 1
Acts Over
Infinite range
- gets weaker as the distance increases as 1/r2
Force Carrier
photon
Top Trump
Holds protons and electrons together in atoms and holds atoms together to make molecules

7. Gravity

8. Gravity Strength Acts Over Force Carrier Graviton (not been detected)
= 1 x
Acts Over
Infinite range
- gets weaker as the distance increases as 1/r2
Force Carrier
Graviton (not been detected)
Top Trump
Keeps our feet on the ground and stars orbiting the centre of the Milky Way

9. Weight versus mass
Earth beach ball and tennis ball DEMO

10. C. Forces acting over a short distance:
Strong nuclear force
Weak nuclear force

11. The Strong Force Strength 100 Acts Over 0.00000000000001m =10-15m
is the size of an atomic nucleus
Force Carrier
Gluon
Top Trump
It holds the atomic nucleus together

12. The Weak Force Alpha Decay He nucleus Gamma Decay Beta Decay
Electron or Positron

13. The Weak Force Strength 0.0000000000001 Acts Over
m=10-18m
Force Carrier
W and Z bosons
Top Trump
Is responsible for radioactivity

14. 2. Electricity
What is electricity?

16. Series circuit
Camera
Dust catcher
Radio antenna

17. Parallel circuit
Camera
Radio antenna
Dust catcher

18. Series circuit
Camera
Dust catcher
Radio antenna

19. Parallel circuit
Camera
Radio antenna
Dust catcher

20. 3. Waves
Sound
Light
Radiation

22. 4. Example Resources

23. Marvin and Milo

24. International Space Station (ISS) Education Kit - Primary
Designed by the European Space Agency to cover a wide range of topics, from science and maths to languages and PE.

25. Playground Forces

26. Bloodhound

27. Website links www.iop.org.uk www.nationalstemcentre.org.uk

28. Actions
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