Experimental Design & Variables

The first step is to identify a question or problem that needs to be investigated.

Controlled variables are the parts of the experiment that remain constant to ensure a fair test.

The dependent variable is the factor that is measured or observed in response to changes in the independent variable.

The independent variable is the factor that is changed or manipulated by the experimenter.

A hypothesis typically includes the independent variable after the word 'IF'.

The control group serves as a standard for comparison, helping to isolate the effects of the independent variable.

The dependent variable is determined by asking what you are measuring or observing as a result of changing the independent variable.

Replicating experiments helps to verify results and ensures that findings are reliable and not due to chance.

A scientific conclusion summarizes the results of the experiment and states whether the hypothesis was supported or not.

Data is collected to provide evidence that supports or refutes the hypothesis.