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In this experiment, the dependent variable is - time - VCE - SSCE Biology - Question 8 - 2019 - Paper 1
Question 8
In this experiment, the dependent variable is - time. - temperature. - the number of bacterial cells. - the percentage of nutrient agar covered by bacteria.
Worked Solution & Example Answer:In this experiment, the dependent variable is - time - VCE - SSCE Biology - Question 8 - 2019 - Paper 1
Step 1
Identify the Dependent Variable
Answer
In scientific experiments, the dependent variable is the factor that is measured and observed in response to changes in the independent variable. In this context, the experiment involves various parameters such as time, temperature, number of bacterial cells, and the percentage of nutrient agar covered by bacteria.
Step 2
Evaluate Each Option
Answer
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Time: Typically an independent variable, controlling the duration of the experiment.
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Temperature: Also an independent variable, affecting bacterial growth and activity.
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The number of bacterial cells: This could be a dependent variable, as it is being measured based on the experimental conditions.
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The percentage of nutrient agar covered by bacteria: This is a clear indicator of bacterial growth and is usually a dependent variable, indicating how successfully the bacteria have proliferated under certain conditions.
Step 3