Question

question 1 - 27
when conducting an experiment, it is important to control all but one variable. why is it important to test one variable at a time?
to reduce the number of trials needed
to identify how the variable alone is affecting the results
to make graphing data more simple during an experiment
to reduce the number of times the experiment must be repeated

Explanation:

In an experiment, controlling all but one variable allows for isolation of the impact of that single variable on the results. This helps in accurately determining cause - and - effect relationships.

Answer:

To identify how the variable alone is affecting the results