Independent Variable, The factor that is deliberately changed by the scientist to test its effect eg. height, Dependent Variable, The factor that is measured or observed to see how it responds to the change eg. circumference of the balloon, Fair Test, An investigation where only one variable is changed and all other variables are kept the same., Control Variables, All the factors that are kept the same to ensure the test is fair and only the independent variable affects the outcome., Trials, Repeated runs of the same experiment to improve reliability., Outliers, Results that are very different from the other results and may not fit the pattern., Average (mean), The sum of all results divided by the number of results., Conclusion, A statement explaining what the results show and whether the hypothesis was supported., Reliability, How consistent the results are when the experiment is repeated - doing more trials improves this, Accuracy, How close a measurement is to the true value - using equipment carefully and selecting the right measurement equipment improves this, Validity, How well the experiment measures what it is intended to measure - making the test fair by controlling other variables improves this.

Evaluating an Experiment

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