Rules and Investigations

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Presentation transcript:

Rules and Investigations Modelling This icon indicates the slide contains activities created in Flash. These activities are not editable. For more detailed instructions, see the Getting Started presentation.

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

…and there are computer models. Flight simulator Car racing game Science 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? 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!

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

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.

Where are you? 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. Let’s take a look…..

Columns

Rows

Cells

Text labels

Numeric data

Formulas

Rules

Variables

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

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.

Summary The End 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. What can I remember? The End