1. What have we learnt so far?

2. Marking a long answer practical question
Read the question on your own and the student’s answer.
What mark (out of 6) would you give the response?
Identify the errors and correct them.
3 minutes

3. Marking a long answer practical question
In pairs compare your marks and corrections, add more detail to your corrections if needed.
2 minutes

4. Marking a long answer practical question
In fours compare your corrections and marks and finalise your thoughts ready to discuss as a class.
2 minutes

5. Describe and explain how you would set up an experiment to determine the resistance characteristics of a filament bulb [6]
Set up the circuit as shown in the diagram. Record amps and volts. Vary the variable resistor and records amps and volts, repeat this step and plot a graph. The resistance of the filament bulb is the gradient. So the steeper the line the lower the resistance. This is because as the current increases the filament gets hot and vibrates more. This increases the resistance.

6. Describe and explain how you would set up an experiment to determine the resistance characteristics of a filament bulb [6]
Set up the circuit as shown in the diagram. Record amps and volts. Vary the variable resistor and records amps and volts, repeat this step and plot a graph. The resistance of the filament bulb is the gradient. So the steeper the line the lower the resistance. This is because as the current increases the filament gets hot and vibrates more. This increases the resistance.
Record the current using the ammeter and the voltage using the voltmeter
Use the variable to resistor to change the voltage in regular intervals and record the current and voltage.
This isn’t a filament lamp!
Plot a graph with V on x axis and I on y axis
The resistance of the filament is the inverse of the gradient
The filament ions (metal ions) vibrate more increasing resistance.

7. Complete the past paper questions
You can write on the sheet.
Make sure you are working on your own and you understand every question.
For those wanting more help with I-V graphs there is a separate sheet for you to do first (it will only take a couple of minutes)
25 minutes

8. Brain Dump 5 minutes In groups of 3
Write down everything you can remember about the electricity topic– everybody needs to write everything down.
5 minutes

9. Brain Dump
Now get into a different group of 3 (you must not be with anyone from your previous group)
Go through your sheets and add to yours or help others add to theirs
Do you have anything you don’t understand?
5 minutes

10. Question time
Time to quiz Mrs Kimberley so you understand everything we have done so far ready for your half-way test tomorrow.