What is an independent variable in an experiment?

• The thing that is measured.

• The thing that is kept constant.

• The thing that is controlled and changed by the experimenter.

• The question the experiment tries to answer.

In an experiment, what does a dependent variable represent?

• The factor that remains unchanged throughout the experiment.

• The outcome that is measured and affected by changes in another variable.

• The variable that the experimenter manipulates.

• A factor that could potentially influence the results but is not directly studied.

If an experiment tests how the amount of water a plant receives affects its height, what is the independent variable?

• The height of the plant.

• The type of soil.

• The amount of water the plant receives.

• The amount of sunlight.

Why are control variables kept constant in an experiment?

• To make the experiment more complex.

• To ensure they do not affect the results.

• To serve as the main focus of the study.

• To be changed by the experimenter.

What is the standard format for a research question in a lab report?

• What is the purpose of this experiment?

• How does my independent variable affect my dependent variable?

• What are the results of the experiment?

• How can I control all variables?