Variables

What are controlled variables?

• Factors that are kept constant throughout an experiment to ensure a fair test.

• Variables that are changed during an experiment to test a hypothesis.

• Elements that are measured to determine the outcome of an experiment.

• Random factors that can affect the results of an experiment.

What is the independent variable in Mr. Pransky's tennis ball experiment?

• The different surfaces.

• The type of tennis ball used.

• The amount of force applied to the ball.

• The temperature of the environment.

How can you identify the dependent variable in a question?

• Look for what is being measured or observed in response to changes in the independent variable.

• Identify the variable that is manipulated by the researcher.

• Determine the constant factors in the experiment.

• Select the variable that remains unchanged throughout the study.

What is the relationship between independent and dependent variables?

• The independent variable is manipulated to see how it affects the dependent variable.

• The dependent variable is manipulated to see how it affects the independent variable.

• Both variables are always constant and do not affect each other.

• Independent variables are always greater than dependent variables.

What happens if the independent variable is not changed in an experiment?

• The experiment will not be able to determine if the independent variable has any effect on the dependent variable.

• The dependent variable will automatically change.

• The results will be inconclusive but still valid.

• The experiment will be considered a success regardless of the independent variable.

Why is it important to identify variables in an experiment?

• It helps to understand the relationship between different factors and ensures accurate results.

• It makes the experiment more complicated and difficult to analyze.

• It allows researchers to ignore irrelevant data and focus on one variable.

• It guarantees that the experiment will yield the desired outcome.

Give an example of a controlled variable in a plant growth experiment.

• Amount of water

• Type of plant

• Amount of soil

• Temperature of the room

In the experiment about tall people jumping, what is the dependent variable?

• The height of the person

• The distance of the jump

• The speed of the jump

• How far the person jumps.

What is the significance of having a control group in an experiment?

• A control group helps to compare results and determine the effect of the independent variable.

• A control group is used to eliminate all variables in an experiment.

• A control group is necessary to ensure that the experiment is conducted ethically.

• A control group is only needed in experiments involving human subjects.

What is a dependent variable?

• A variable that is manipulated in an experiment.

• A variable that is measured or observed in an experiment, which is affected by the independent variable.

• A constant factor that does not change during an experiment.

• A variable that remains unchanged regardless of other variables.