Variables in Experiments
Biology ⇒ Scientific Inquiry and Experimental Design in Biology
Variables in Experiments starts at 6 and continues till grade 12.
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See sample questions for grade 10
A researcher wants to test the effect of pH on enzyme activity. List one possible controlled variable.
A scientist wants to test the effect of temperature on the rate of enzyme activity. What is the dependent variable?
A student investigates the effect of different types of music on plant growth. Identify the independent, dependent, and one controlled variable.
A student investigates the effect of salt concentration on the rate of osmosis in potato slices. Identify the independent and dependent variables.
Describe how you would identify the dependent variable in a given experiment.
Describe the difference between an independent variable and a dependent variable.
Describe the purpose of controlled variables in an experiment.
Explain the consequences of not controlling variables in an experiment.
Explain why it is important to have only one independent variable in an experiment.
Explain why it is important to identify all variables before starting an experiment.
In an experiment testing the effect of sunlight on plant growth, what is the dependent variable?
In an experiment, a student measures the effect of different water temperatures on the time it takes for sugar to dissolve. What is the dependent variable?
In an experiment, a student tests the effect of different amounts of fertilizer on plant height. What is the independent variable?
List two examples of controlled variables in an experiment measuring the effect of pH on seed germination.
What is the independent variable in an experiment?
