Define the term ‘variable’ in scientific research.

In scientific research, the term 'variable' refers to a factor that can be changed or controlled in an experiment. This allows researchers to investigate the effects of different conditions or treatments on the outcome of their study. Variables can take on different values and help to establish cause-and-effect relationships by identifying how changes in one aspect of the experiment influence other aspects. By manipulating variables, scientists are able to gather data and draw conclusions about the interactions within the system being studied.

Identifying and defining variables is essential in the design of experiments, as it helps ensure that the investigation is systematic and that the results are valid. Understanding how variables operate can lead to clearer insights and robust conclusions based on the collected data.