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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