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In this video we will discuss how to write your variable section.

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We will talk about your independent and dependent variables and your control variables.

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This section is marked under the exploration criterion.

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Your variable section should have a very clear structure.

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You can simply follow the structure that I will show you in the example IA.

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As you can see, variables are in the first subsection under planning.

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This is further divided into independent variable, dependent variable and control variables.

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For the independent and dependent variables, be sure to use their full name and add units.

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In this IA I have four control variables.

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The exact number will depend on your investigation, but you should probably have at least three.

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For each control variable I include the reason why it should be controlled and the method

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of how it will be controlled in the experiment.

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I will just quickly show you my other three control variables, which are glass cross-sectional

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area liquid used in the glasses and air temperature.

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This completes step three, action one, so now you know how to write your variable section.

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In the next video we will talk about your apparatus diagram.