Investigating osmosis
Investigating the water potential of potato using the weighing method. you should add the data and graph. It should be about 1500 words.
2. Procedure
The procedure must be a detailed and clearly explained step by step method of the experiment with methodical and sequential instructions including range and repeats. Discuss the suitability of the procedure in relation to the aim of the investigation.
3. Materials
You must include a full list of all apparatus and equipment used during the experiment supported by a clear and annotated scientific diagram. Explain the choice of suitable materials and measurement strategies that enable you to produce accurate and precise results.
4. Variables
Identify and explain the dependent and independent variables within the experiment, including units, values and range. Also note at least two controlled variables within the experiment, explain how they are controlled and the consequences that will occur if they are not controlled.
5. Safety
Identify all hazards related to the experiment and assess the risks associated with these hazards. Also describe and justify the appropriate safety precautions that must be carried out to ensure the experiment is conducted safely in a laboratory environment.
6. Results table
Your results must be recorded accurately in a suitable table, with correct headings, units and rounding. The results should be presented clearly and must be fully reliable, including any required calculations.
7. Results graph
Your graph must be hand drawn with an appropriate scale, units and title. It should include independent and dependent variables labelled correctly on the axes. Your results must be accurately plotted on the graph, including a line/curve of best fit.
8. Critical analysis of results – conclusion
This section must include a detailed analysis of the results, identifying and describing clear trends and patterns with reference to your results data and graph. You should ensure scientific terminology is used to critically analyse the results, which includes suggestions of any further calculations or experimentation that may be required. Research should also be conducted to support your findings and fully explained with this section.
Your analysis must also show appropriate basic statistical test calculations (mean, rate etc) with detailed explanations of how this relates to your original aim/hypothesis and whether this can be accepted or rejected. Include suggestions with justifications of alternative suitable tests that may be used to further analyse the results.
9. Evaluation of scientific investigation
Provide a scientific critique of the experimental design and procedure of your experiment, identifying at least two areas of improvement. Anomalies should be identified, and explanations given into possible sources of errors and uncertainties. Also include the consequences of potential/identified anomalies and how this affects the processing of data, looking at future experiments of this nature.
