1. Electrical Cells
Energise me - lesson 5

2. Name the different forms of energy.
Electrical Cells
Date
Lesson Outcomes
How I did
Targets
Task Describe the two main types of electrical cell.
Level 5
Task Explain the advantages and disadvantages of electrical cells.
Level 6
Task 3:. Plan an experiment to find out the best types of battery and analyse the results.
Level 7
Connector: (Level 4)
Name the different forms of energy.

3. Batteries An electrical cell is another name for a battery.
Make a list of as many things that you can think of that use batteries, for example a mobile phone.

4. Different Types
In your lists most of you would have had batteries that you either use again or throw away.
These are called RECHARGEABLE and DISPOSABLE.
Write a definition of what these words mean.

5. Rechargeable Cells
A rechargeable cell or battery allows you to plug it in to the mains supply and 're-energise'
All this means is that you are replacing the electrical energy!

6. Disposable Cells
A disposable cell has a fixed amount of electrical charge, once this charge has been transferred to something it cannot be replaced.
When all the electrical energy has been transferred the battery is thrown away.

7. Task 1
You work for an advertising company and have been asked to produce a slogan for their new brand of rechargeable batteries.
Make sure your slogan explains the differences between rechargeable and disposable!

8. Name the different forms of energy.
Electrical Cells
Date
Lesson Outcomes
How I did
Targets
Task Describe the two main types of electrical cell.
Level 5
Task Explain the advantages and disadvantages of electrical cells.
Level 6
Task 3:. Plan an experiment to find out the best types of battery and analyse the results.
Level 7
Connector: (Level 4)
Name the different forms of energy.

9. What happens to disposable batteries?
We already said that disposable means that we throw it away when we are finished, where do these batteries end up?

10. Landfill Sites
Anything which is not recyclable is sent to a landfill site where it is buried under tonnes of rubbish.
Batteries contain some dangerous chemicals, why would you not want these crushed?

11. Recycling
Some supermarkets now have recycling bins just for batteries.

12. Disposable V Rechargeable
Rechrgeable
Cheap
Less damage to the environment
Easy to buy in shops
Last longer
Don't last long
Expensive
Damage to the environment
Cost less in the long term
Hold charge for longer
Charge decreases over time
Task 2
Use the table to write a paragraph to explain the advantages and disadvantages of the different cells.

13. Name the different forms of energy.
Electrical Cells
Date
Lesson Outcomes
How I did
Targets
Task Describe the two main types of electrical cell.
Level 5
Task Explain the advantages and disadvantages of electrical cells.
Level 6
Task 3:. Plan an experiment to find out the best types of battery and analyse the results.
Level 7
Connector: (Level 4)
Name the different forms of energy.

14. Which Battery lasts the longest?
You have seen the adverts on TV, most companies say their battery will last longest. We are going to plan an experiment to test the following Hypothesis
"I think the Duracell battery will last the longest. I also believe that the more expensive the battery the longer it will last"
Write down this hypothesis in your book.

15. Variables Independent variable (What's changed?)
Dependent variable (What's measured?)
Control variable (What needs to be kept the same?)

16. Variables Independent variable (What's changed?) The make of battery.
Dependent variable (What's measured?)
The time it takes for the battery to run out of charge.
Control variable (What needs to be kept the same?)
The same bulb, same stopwatch

17. Task 3 -Part 1
Write a short method to explain how you would do your experiment, remember to explain how you would make sure the your experiment is REPEATABLE.

18. Example
I experimented by testing the power of four different brands of batteries. I did this by hooking up the batteries to a light bulb. I then kept track of the length of time each bulb stayed lit. I tested two batteries from each of the four brands of batteries.
How good is this method?
What level would you give it?
Now level the persons work next to you using the sheets in your book!

19. Task 3 - part 2
After the testing was completed the following results were recorded: The Duracell battery lasted the longest, 101 hours and 20 minutes; Energizer battery, second, 99 hours and 17 minutes; Eveready battery, third, 28 hours and 30 minutes, and last but not least was the BA 30 batteries, 25 hours ad 58 minutes.
Is this the best way of recording results?
Turn this information into a table.
What do these results tell you?

20. Name the different forms of energy.
Electrical Cells
Date
Lesson Outcomes
How I did
Targets
Task Describe the two main types of electrical cell.
Level 5
Task Explain the advantages and disadvantages of electrical cells.
Level 6
Task 3:. Plan an experiment to find out the best types of battery and analyse the results.
Level 7
Connector: (Level 4)
Name the different forms of energy.

21. Review Hot seat challenge Write down three questions.
A 'what.....' question is worth one point
A 'how.....' question is worth two points
A 'why.....' question is worth three points