Independent Variable and Control Group

Front

What is an independent variable?

Back

The independent variable is the factor in an experiment that is deliberately changed or manipulated by the scientist to observe its effect on the dependent variable.

Front

What is a control group?

Back

A control group is a group in an experiment that does not receive the experimental treatment and is used as a benchmark to measure how the other tested subjects do.

Front

In an experiment testing how light affects plant growth, what is the independent variable?

Back

The amount of light.

Front

In an experiment comparing different cleaners, what is the independent variable?

Back

The type of cleaner.

Front

What is the dependent variable?

Back

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

Front

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

Back

A control group is important because it provides a standard for comparison, helping to isolate the effects of the independent variable.

Front

What is the relationship between independent and dependent variables?

Back

The independent variable is manipulated to observe its effect on the dependent variable, which is measured.

Front

In the hypothesis 'If plants are watered more than normal, then growth height will increase,' what is the independent variable?

Back

The amount of water.

Front

In an experiment testing the effect of different fertilizers on plant growth, what is the independent variable?

Back

The type of fertilizer.

Front

What does it mean to manipulate an independent variable?

Back

To manipulate an independent variable means to change it intentionally in an experiment to observe the effects on the dependent variable.