Osmosis Internal Assessment - Biology Higher Level
| The effect of salinity on osmosis of solanum tuberosum L.(potatoes) | Biology HL Internal Assessment – Year 10 | | Teresa Nguyen | |
Table of Contents 1 DESIGN 2 1.1 Defining the problem 2 FOCUS QUESTION 2 HYPOTHESIS 2 BACKGROUND INFORMATION 2 INVESTIGATION VARIABLES 3 1.2 Controlling Variables 3 TREATMENT OF THE CONTROLLED VARIABLES 3 CONTROL EXPERIMENT 4 1.3 Experimental Method 4 MATERIALS 4 RISK ASSESSMENT 5 METHOD 5 2 DATA COLLECTION and PROCESSING 7 2.1 Recording Raw data 7 QUANTITATIVE RAW DATA 7 QUALITATIVE RAW DATA 7 2.2 Processing Raw Data 8 Processed Data Table 9 3 Conclusions and Evaluation 11 3.1 Conclusion 11 CONCLUSION STATEMENT 11 CONCLUSION EXPLANATION 11 3.2 Evaluation Procedures 12 RELIABLITY 12 LIMITATIONS/WEAKNESSES/ERROR IN LABORATORY INVESTIGATIONS 13 3.3 Improving the Investigation 14 MODIFICATION TO THE EXPERIMENT 14 Bibliography 15 Appendixes 16 Appendix A – Risk Assessment 16 Appendix B – Turnitin Receipt 19 Appendix C – Journal 19
1 DESIGN
1.1 Defining the problem
FOCUS QUESTION
What is the effect of osmosis on the mass (g) of solanum tuberosum L. (potatoes) after duration of 24 hours in varying concentration levels (2%, 5%, 10%, 20% and 25%) of sodium chloride (table salt)?
HYPOTHESIS
Solanum tuberosum L. final masses will decline as the concentration (2%, 5%, 10%, 20% and 25%) of sodium chloride increases. Potato slices placed in distilled water will have higher mass percentage due to the cells becoming turgid.
BACKGROUND INFORMATION
Diffusion is the movement of molecules from a hypertonic (high concentration solute) to the hypotonic (low concentration of solute). There are different types of diffusion one of which is osmosis. Osmosis is the movement of water molecules through a semipermeable membrane that allows only smaller molecules such as water to pass through and prevent larger molecules to enter such as glucose or sodium chloride. (Bozeman Biology, 2012)
Within osmosis
Table of Contents 1 DESIGN 2 1.1 Defining the problem 2 FOCUS QUESTION 2 HYPOTHESIS 2 BACKGROUND INFORMATION 2 INVESTIGATION VARIABLES 3 1.2 Controlling Variables 3 TREATMENT OF THE CONTROLLED VARIABLES 3 CONTROL EXPERIMENT 4 1.3 Experimental Method 4 MATERIALS 4 RISK ASSESSMENT 5 METHOD 5 2 DATA COLLECTION and PROCESSING 7 2.1 Recording Raw data 7 QUANTITATIVE RAW DATA 7 QUALITATIVE RAW DATA 7 2.2 Processing Raw Data 8 Processed Data Table 9 3 Conclusions and Evaluation 11 3.1 Conclusion 11 CONCLUSION STATEMENT 11 CONCLUSION EXPLANATION 11 3.2 Evaluation Procedures 12 RELIABLITY 12 LIMITATIONS/WEAKNESSES/ERROR IN LABORATORY INVESTIGATIONS 13 3.3 Improving the Investigation 14 MODIFICATION TO THE EXPERIMENT 14 Bibliography 15 Appendixes 16 Appendix A – Risk Assessment 16 Appendix B – Turnitin Receipt 19 Appendix C – Journal 19
1 DESIGN
1.1 Defining the problem
FOCUS QUESTION
What is the effect of osmosis on the mass (g) of solanum tuberosum L. (potatoes) after duration of 24 hours in varying concentration levels (2%, 5%, 10%, 20% and 25%) of sodium chloride (table salt)?
HYPOTHESIS
Solanum tuberosum L. final masses will decline as the concentration (2%, 5%, 10%, 20% and 25%) of sodium chloride increases. Potato slices placed in distilled water will have higher mass percentage due to the cells becoming turgid.
BACKGROUND INFORMATION
Diffusion is the movement of molecules from a hypertonic (high concentration solute) to the hypotonic (low concentration of solute). There are different types of diffusion one of which is osmosis. Osmosis is the movement of water molecules through a semipermeable membrane that allows only smaller molecules such as water to pass through and prevent larger molecules to enter such as glucose or sodium chloride. (Bozeman Biology, 2012)
Within osmosis
Bibliography: BBC. 2012. BBC - GCSE Bitesize: Osmosis in cells. [ONLINE] Available at:http://www.bbc.co.uk/schools/gcsebitesize/science/add_gateway_pre_2011/greenworld/waterrev2.shtml. [Accessed 01 October 12]. | Bowen Holler, B., 2012. The Effect of Salinity on Osmosis in Solanum tuberosum (potatoes). Gold Coast: Bianca Holler. | Appendixes