Hypothesis - An educated guess about the outcome of an experiment, Dependent variable - what is being measured during the practical. , Independent variable - the factor that has been changed during the practical., Control variable - all variables that are kept constant during the practical., Validity - measures whether the practical has met the aim and hypothesis, Reliability - measures whether the technique allows the measurements to be constantly collected and repeated., Precision - measures whether measurements are close to each other- within an accepted range., Accuracy - measures whether measurements are close to the true or accepted value- within an accepted error of the true value, Analysis - Making use of tables or graphs to allow the data to be interpreted, Operationalisation of variables - to how you will define and measure a specific variable as it is used in your study. ..., Errors ( Measurement uncertainties) - these are either random or systematic errors that impact on the result of a practical, Qualitative - this involves observing a practical., Quantiative - this involves taking numerical measurements and data,

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