1. Can you match up the objects with the substance that resists them?
Moving
Object
Resisted By
Can you match up the objects with the substance that resists them?
What does “resist” mean?
Do any of these resistances change? When/Why/How
Boat
Air
Current / Electrons
Water
Skydiver
Atoms

2. The boat is resisted by water
The Water stops the boat from moving any faster, it opposes the motion of the boat.
Would the temperature of the water affect the resistance?
Can you explain why using the particle model?
What If...
The boat was in a lake made of treacle?

3. What If...
The boat was in a lake made of treacle?
Resistance would increase
So the boat would go slower

4. Would the temperature of the water affect the resistance?
Can you explain why using the particle model?
Higher temperature
Particles vibrate more
Particles collide more and spread out
Liquid expands and becomes less dense
Resistance decreases

5. The skydiver is resisted by air
What happened to the resistance as Felix Baumgartner fell closer to earth?
It increased
Skydiver
Air

6. Electricity
Resistance

7. These are the atoms that electrons move through
They cause an electric resistance to current
Different conductors have different:
Areas and lengths
Sized atoms
Spaces between the atoms
Amounts of electrons
Which gives them different resistances

8. Definition of resistance
Resistance is a measure of how hard it is for a current to flow through a component in a circuit.
Resistors are added into a circuit to reduce the amount of current flowing. The bigger the value of resistance, the lower the current.

9. “Different resistances” placemats
Look at the placemats about wires of Different resistances, and a rheostat set to different resistances.
Be ready to report back to the class.

10. Practical
Use test circuit to get results onto worksheet, then draw graph to find relationship between voltage and current.

11. Plenary
Write a paragraph about the journey of an electron around a circuit containing a bulb and a resistor.
You should write about the energy transfers that are going on in the circuit.