Experimental Design & Data Practice

What is the role of the independent variable in an experiment?

• It is the result of the experiment.

• It is what is measured on the Y-axis.

• It is what the experimenter changes.

• It is kept constant throughout the experiment.

What does the dependent variable represent in an experiment?

• The variable that is manipulated.

• The conditions that remain the same.

• The outcome or result of the experiment.

• The variable that is kept constant.

What is the purpose of controlled variables in an experiment?

• To measure the results on the X-axis.

• To ensure that all conditions except the test variable remain the same.

• To provide the "treatment" to the experiment.

• To change in response to the independent variable.

What is the function of a control group in a scientific experiment?

• To receive various treatments for comparison.

• To be manipulated by the experimenter.

• To not receive the treatment and serve as a baseline for comparison.

• To measure the dependent variable.

What is the independent variable in the scenario where a study was done to find if different tire treads affect the braking distance of a car?

• Braking Distance

• Type of Car

• Different Tire Treads

• Same Track

In the scenario where the time it takes to run a mile depends on the person's running shoes, what is the dependent variable?

• Running Speed

• Time

• Type of Shoes

• Track

What are the constants in the experiment where the height of bean plants depends on the amount of water they receive?

• Amount of Water

• Height

• Type of Plant, Amount of Light, Soil

• Air Temperature

For the scenario where the higher the temperature of the air in the oven, the faster a cake will bake, what is the dependent variable?

• Type of Cake

• Cake Baking Speed

• Air Temperature

• Type of Pan

In the example where lemon trees receiving the most water produced the most lemons, what is the independent variable?

• Number of Lemons

• Amount of Water

• Type of Plant

• Amount of Light

What is the dependent variable in the study of the effect of pH on the number of tadpoles?

• pH of water

• Number of tadpoles

• Type of water

• Temperature of water