1. Modelling using a spreadsheet Year 7 Lesson 2

2. Targets I will be able to: Use Excel to investigate and correct a simple model by: Use Excel to investigate and correct a simple model by: 1. Formatting and labelling data appropriately 2. Entering rules or formulae 3. Explaining the rules that govern a model Test whether a model works or not. Test whether a model works or not.

3. What If… You had only 5 sets of animals, and a budget of £500? Which would you choose? You had only 5 sets of animals, and a budget of £500? Which would you choose? You had all 9 sets of animals, and a budget of £1000? You had all 9 sets of animals, and a budget of £1000? You had to pay £10 per week more to feed the penguins? How will your model be affected? You had to pay £10 per week more to feed the penguins? How will your model be affected? How will you change your model? How will you change your model?

4. What does Model mean? A model is a computer simulation (like a computer racing car game). A model is a computer simulation (like a computer racing car game). They can be used to answer ‘What If..?’ questions. They can be used to answer ‘What If..?’ questions. Once a model has been set up it is easy to change the data to see how this affects the outcome. Once a model has been set up it is easy to change the data to see how this affects the outcome. The input and output data are called variables because they can change. The input and output data are called variables because they can change.

5. What are Models for? We use models to try out different situations that would be to costly or dangerous to do in real life. We use models to try out different situations that would be to costly or dangerous to do in real life. Testing orbital paths of rockets. Testing how different designs or models of a car behaves in serious accidents. Investigating mass production of a new line in chocolate.

6. Some examples Weather Weather Weather Waves Waves Waves They are also used to: Predict profits in business. Predict profits in business. Find out how buildings will be affected by earthquakes. Find out how buildings will be affected by earthquakes. Test escape routes from buildings if they are on fire. Test escape routes from buildings if they are on fire. Predict how a disease or virus might spread. Predict how a disease or virus might spread.

7. Next Round Win= Oldham, Plymouth Win= Oldham, Plymouth Loss= Ipswich, Crewe Loss= Ipswich, Crewe Draw= Bury, Man City Draw= Bury, Man City No game = Birmingham, No game = Birmingham,

8. Can you explain things further? How are absolute cell references used? Why are they used? How are absolute cell references used? Why are they used? How is the sort function used to indicate league positions? How is the sort function used to indicate league positions? How could you change the model if 4 points were given for a win? How could you change the model if 4 points were given for a win? How could you extend the model to include goal difference if two teams had the same points? How could you extend the model to include goal difference if two teams had the same points?

9. Biscuits Which cells contain variables? Which cells contain variables? A2 A2 D3 to E8 D3 to E8 Which of these is more Likely to be changed by the user? Which of these is more Likely to be changed by the user? A2 A2 Which cells contain rules or formulae? Which cells contain rules or formulae? F3 to G8 F3 to G8 E10 E10 G10 G10 Which cell shows the output of the Model? Which cell shows the output of the Model? G10 G10 What does each formula in the model do? What does each formula in the model do?

10. Plenary I will be able to: Use Excel to investigate and correct a simple model by: Use Excel to investigate and correct a simple model by: 1. Formatting and labelling data appropriately 2. Entering rules or formulae 3. Explaining the rules that govern a model Test whether a model works or not. Test whether a model works or not. Which can you do? Which can you do?