Experimental Design

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What are constants in an experiment?

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Constants are the parts of the experiment that must be kept the same to ensure that the results are valid.

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What is the purpose of using a placebo in an experiment?

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The placebo effect is used to compare results between the real medicine and the placebo, helping to determine the actual effect of the treatment.

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What is an independent variable?

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The independent variable is the factor that an experimenter changes on purpose to observe its effect.

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What makes a good scientific question?

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A good scientific question can be answered by doing an experiment.

Front

In an experiment on plant growth, what is the independent variable if different liquids are used?

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The independent variable is the type of liquid given to the plants.

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What is a dependent variable?

Back

The dependent variable is the factor that is measured in an experiment, which is affected by changes in the independent variable.

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What is a control group?

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A control group is a standard of comparison in an experiment, which is not exposed to the independent variable.

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Why is replication important in experiments?

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Replication is important to ensure that results are consistent and reliable across multiple trials.

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What is the difference between qualitative and quantitative data?

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Qualitative data describes characteristics or qualities, while quantitative data involves numerical measurements.

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What is a hypothesis?

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A hypothesis is a testable prediction about the relationship between variables in an experiment.