Experimental Variables Quiz

What is an independent variable in an experiment?

• The variable that is measured

• The variable that is changed by the experimenter

• The variable that stays the same

Which of the following best describes a dependent variable?

• It is the variable that is changed by the experimenter

• It is the variable that is kept constant

• It is the variable that is measured

In an experiment, what is the purpose of a control variable?

• To change the outcome of the experiment

• To keep certain factors the same

• To measure the effect of the independent variable

What is a control group in an experiment?

• The group that receives no special condition/ treatment

• The group that receives the special condition/ treatment

• The group that measures the dependent variable

Which of the following is true about an experimental group?

• It is the group that is not exposed to the special condition/ treatment

• It is the group that is exposed to the special condition/ treatment

• It is the group that stays the same

In an experiment to test the effect of sunlight on plant growth, what would be the dependent variable?

• Amount of sunlight

• Type of plant

• Growth of the plant

If a scientist wants to test the effect of temperature on how easily a substance is able to dissolve (solubility), what is the independent variable?

• Temperature

• Solubility/ How easily the substance is able to dissolve

• Type of substance

Why is it important to have a control group in an experiment?

• To ensure the experiment is biased

• To compare with the experimental group

• To change the independent variable

In an experiment, which variable is deliberately changed to observe its effect?

• Control variable

• Dependent variable

• Independent variable

What is the role of control variables in an experiment?

• To change the outcome of the experiment

• To ensure results are due to the independent variable

• To provide a baseline for comparison