Rules and Investigations Modelling. A model by any other name? There are real life models…

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Presentation transcript:

Rules and Investigations Modelling

A model by any other name? There are real life models…

…and there are computer models. A model is a representation. A model imitates the conditions of a real event. A model allows us to ask What if? And test it! Flight simulatorCar racing gameScience experiment What if the plane landed too quickly? What if the driver goes around that bend at 120 mph? What if the chemical was added at a slower rate?

The advantages of modelling Much cheaper than using the real thing. Can simulate dangerous situations. Allows for data to be changed to see the consequences. Quick results. Simulation can be speeded up.

The disadvantage of modelling Results are usually only approximate and are not exact.

Types of modelling software include: software for engineers to design buildings software to allow the modelling of sewage pipes and water flow to calculate needs software to allow military personnel to be prepared for emergencies.

A spreadsheet is a computer programme which allows you to create a number of models. It is made up of columns, rows and cells. Formulas can be added to make any calculations. Where are you? Let’s take a look…..

Columns

Rows

Cells

Text labels

Numeric data

Formulas

Rules

Variables

Saving for a digital video camera Earning money by washing cars Making a profit

A spreadsheet model can be used to work out how much money can be made by washing cars over three months. Three main figures need to be calculated: total amount earned … income total amount spent … expenditure money left over... profit.

A model is a representation of a real thing. Spreadsheets can be used for modelling. Spreadsheets are made up of columns, rows and cells. Data in a cell can be a text label, numeric data or a formula. A formula is a rule. A quantity that can change is a variable. Spreadsheets can be used to test “What if?” questions. Changing a variable has a consequence. Summary What can I remember ?