Planning
Planning an Experiment
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Define the research question β To start planning an experiment, it is essential to define the research question. This should be a clear, focused and detailed question that the experiment aims to answer.
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Identify the variables β The independent, dependent and control variables need to be clearly identified. The independent variable is the one that is manipulated, the dependent variable is the one being measured, and any control variables are those kept constant to ensure a fair test.
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Formulate a hypothesis β Based on prior knowledge and preliminary research, formulate a hypothesis or prediction for the results of the experiment.
Experimental Design
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Select appropriate apparatus β Choose the equipment that will be suitable for the experiment. Consider accuracy and the range of measurement that each piece of equipment offers.
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Create a procedure - This should be a detailed, step-by-step guide to carrying out your experiment. Be sure to include the initial steps needed to set up the experiment, how the data will be collected, and how the independent variables will be manipulated.
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Safety considerations - All potential hazards and risks in the experiment should be considered and described. Protective measures for handling equipment and materials should also be included.
Data Collection
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Plan data collection methods - propose how data will be collected, including the method of measurement and how to reduce error.
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Specify intervals - where relevant, define the intervals at which data will be collected.
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Data recording - Plan for an organised method to record the data collected, making it easier to analyse and interpret later on.
Data Analysis and Interpretation
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Data representation - Decide on the best method to represent the data visually for easier interpretation. This might include graphs, charts, or tables.
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Error and uncertainty analysis - Plan for an analysis of possible errors and uncertainties in measurements. Consider both systematic and random errors and propose methods to handle or minimize these.
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Statistical tests - Determine which statistical tests may be useful for analysing the data and for validating conclusions.
Remember, the quality of the planning stage has a great impact on the success of the experiment and the reliability of the conclusions drawn. Good planning is science in action!