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Formulae can create output as charts and graphs like a pie chart.

Models 02

ICT models let you test decisions safely. Learn how spreadsheets, simulations, and diagrams represent real situations, so you can predict results and choose the best option.

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Fascinating Fact:

Some models use real-time data, like weather models using fresh sensor readings to improve predictions.

In KS3 ICT, a model is a way to simplify a real problem so it is easier to understand and test. Models help you explore different scenarios, spot patterns, and compare choices without taking real-world risks.

Key Terms

Variable: A value you can change in a model to see how it affects the outcome.
Assumption: A starting idea a model uses when it does not include every real-world detail.
Scenario: One set of inputs and conditions you test to compare possible outcomes.

Frequently Asked Questions (Click to see answers)

What is a model in ICT KS3?

In KS3 ICT, a model is a simplified version of a real situation that helps you understand it and predict what might happen, such as using a spreadsheet to plan costs.

What is the difference between a model and a simulation?

A model is the overall representation of a situation, while a simulation is a type of model that runs through changes over time so you can see how a system behaves.

How do you check if an ICT model is accurate?

You can check an ICT model by using realistic inputs, testing it with known results, and reviewing the assumptions. If small input changes cause strange outputs, the model may need improving.

Try These Related Quizzes

1 .

Which of these is not a formula?

=C3+F2*H5

=C3-F2*$H5

-C3/F2*H5

=C3*F2*H5

Doesn't start with =

2 .

Models represent real life situations using .......

data and analysis

data and intuition

data and rules

data and statistics

The rules decide what happens to the data

3 .

Spreadsheet models use ....... to represent rules.

cells

conditional formatting

formulae

symbols

The formulae need to be set up very carefully to avoid incorrect results

4 .

The values in the spreadsheet cells act as .......

information

input

macros

reports

These can be entered manually or calculated from data that has been entered into other cells

5 .

The formulae in the models act as .......

calculations

data

enquiries

processes

These are effectively the rules that dictate how a model works. If just one of these is wrong, the whole model will fail

6 .

The formulae can create output as charts and graphs.

Charts and graphs are the only form of output possible

Charts and graphs are vital to understand predictions

Charts and graphs can improve understanding of results

Charts and graphs make the output more accurate

Use them when they are useful - not just for looks

7 .

Spreadsheets are good at doing ....... analysis of data.

how-why

what-else

what-if

why-when

For example: What happens to sales if tax rates increase?

8 .

A model rule is: profit = number sold x saleprice - cost.

A suitable formula might be: =D5x(C5-B5)

A suitable formula might be: =D5x(C5/B5)

A suitable formula might be: =D5*(C5-B5)

A suitable formula might be: =D5^(C5-B5)

The 'rule' is represented by a formula entered in a cell

9 .

Models often include many rules because .......

a single formula can only handle simple rules

real world situations are often very complicated

results can be achieved much quicker with more rules

the more rules used, the more accurate the results

Even simple situations can need many rules to model

10 .

Predictions made by models are usually .......

approximate

correct

exact

wrong

Rules are rarely perfect and may not have complete data

You can find more about this topic by visiting BBC Bitesize - Spreadsheets

Author: Duncan Daish

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