Identify Significant Sources of Errors & Precautions to be taken

• In performing your experiment, you need to pay attention to your teacher’s instructions on the procedure in conducting the laboratory work.
• You may be asked to identify significant sources of errors and explain how they may affect your results.
• You may be asked to state and explain how significant sources of errors (including experimental procedures) may be overcome or improved.
• You may state the precautions you have taken to improve the accuracy of your measurement and the reliability of the experiment. Any precaution given as a step in the procedure for the experiment cannot be quoted as a precaution. A precaution must always include the step to be taken, when the step is to be taken and why the step should be taken.
• When asked for one precaution, no mark will be awarded if 2 or more precautions are given as the student has to make the decision as to the best precaution to present in their answer and not expect the marker to choose the precaution.

Always identify and explain the purpose of any precaution with specific reference to the context of the experiment.