Conducting a fair test is one of the most important ingredients of doing good, scientifically valuable experiments. To insure that your experiment is a fair test, you must change only one factor at a time while keeping all other conditions the same. Scientists call the changing factors in an experiment variables.
Answer: Answers can always be different and varied.
Explanation: There can always be anomalies in scientific experiments and there is usually no correct answer as it is usually shown as an average score of something.
