Modelling with Sketches

Question 1

Which statement best explains why scientists use a model of the Earth’s atmosphere?

Accepted Answer

It simplifies the real system, allowing scientists to understand how it works and to predict how it will respond to changes.

Answer

It cannot be used to make predictions about the atmosphere’s behavior.

Answer

It includes every detail of the real atmosphere, so no simplification is needed.

Answer

It is an exact replica of the atmosphere, so it behaves identically in all situations.

Question 2

Which statement best describes the purpose of using a model of a river’s flow when scientists study the impact of building a dam?

Accepted Answer

It simplifies the real river system so scientists can understand how the dam will affect water speed and predict changes.

Answer

It cannot be used to forecast how the river will respond to the dam because models are only descriptive.

Answer

It is created mainly for decorative purposes and does not aid scientific analysis.

Answer

It is an exact miniature copy of the river, showing every detail of the real system.

Question 3

Which statement best describes the role of a scientific model?

Accepted Answer

A model simplifies a real system so that we can understand how it works and predict how it will respond to changes.

Answer

A model is used only to illustrate a system for artistic purposes and cannot be used for predictions.

Answer

A model provides an exact replica of a system, including all its detailed measurements.

Answer

A model replaces the real system entirely, making further experiments on the actual system unnecessary.

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