• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

An Investigation into the water relations of plant tissue.

Extracts from this document...

Introduction

Christ the King School: Centre 34675 An Investigation into the water relations of plant tissue Name: Josh Bladen 11D Introduction: For my year 10 Biology coursework, I was asked to investigate Osmosis, and it's effect on foodstuffs, namely potatoes. Osmosis is the movement of water molecules from an area of high concentration in a dilute solution to an area of low concentration in a concentrated solution, through a partially permeable membrane such as a cell membrane. The problem I have been asked to investigate is a farmer's crop of standard white potatoes, on low level land near to the coast. I have been asked to show how much sea water flooding the crop can take before irreparable damage is done to the crop and it becomes unsellable. This damage would be caused by osmosis, as I have outlined above. Because the sea water is salty, it has less water in it than the water inside the potato cells, causing the water in the potatoes to drain out to the surrounding sea water. ...read more.

Middle

Controlled variables: In order to make this experiment a fair test, we must change only one thing and keep everything else the same. Sucrose Solution Concentration We must change this as it is the basis for our experiment. We will change it in 25% increments, but as we have 30 chips and are putting 3 in each tube, we must use ten tubes. So, the second rack will have increments of 25%, but will start at 12.5%, so as to show the differences between rack one values. Size of potato chips This must be kept the same in order to obtain accurate result. If the chips are oddly sized then the osmosis may act on the smaller, thinner chips with less water faster and thus spoil our results. Amount of solution in each tube Must be kept the same or else there will be tubes that had more solution will weigh less and the tubes with less in may not even cover the chips, causing them to weigh more. ...read more.

Conclusion

12.98 10.98 C 37.5% 13.02 11.02 A 50% 13.00 10.65 B 50% 13.01 10.40 C 50% 13.02 10.36 A 62.5% 13.00 10.01 B 62.5% 12.99 09.97 C 62.5% 13.00 11.00 A 75% 13.00 08.79 B 75% 13.00 08.55 C 75% 12.98 08.88 A 87.5% 13.00 07.03 B 87.5% 13.03 06.97 C 87.5% 13.02 06.94 A 100% 13.00 04.98 B 100% 13.03 04.99 C 100% 13.03 05.02 Graphs: Conclusion: Discuss your prediction, and osmosis. Talk about every part of the graph and what's happened. What about results that don't fit - including those in your table, not just the graph. Relate back to the original question about plants and sea water. It might seem like you're repeating some of the introduction - that's ok. A quarter of the marks are for the conclusion - don't skimp. If you need to add drawings to illustrate your conclusion, click a few returns to make space and draw them by hand on your print out. Evaluation: Josh Bladen 11D Page 1 of 4 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Life Processes & Cells section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Life Processes & Cells essays

  1. An experiment to investigate osmosis in plant tissue.

    Try to leave all chips for the same time of one hour as they will all have same time for osmosis to occur. viii. Keep all the chips in same temperature if some are kept hotter or cooler than others their results will differ.

  2. Osmosis is defined as 'the movement of water molecules from an area of high ...

    This should help us lead to a more accurate result, and the average percentage will be used to present the graph. SOLUTION NUMBER WEIGHT INCREASE OR PERCENTAGE OF TEST BEFORE (g) AFTER (g) DECREASE (g) (%) DISTILLED 1 4.87 4.89 0.02 0.41 WATER 2 4.81 4.84 0.03 0.62 3 4.85

  1. Osmosis In Plant Tissue.

    Make sure each potato has absorbed to its optimum and then gently wipe off any excess fluid. Then measure the potato chips and see the differences. Results Table. Solution No Sugar Added Weak Sugar Solution Strong Sugar Solution Length Of Potato Chip At Start (cm)

  2. Factors Affecting Osmosis In Plant Tissue

    other piece will be placed in a the same volume of pure distilled water. This complete contrast of solutions is to give the widest range of possible results in the smallest amount of data, so that it is possible to use this for the main experiment.

  1. Investigation on the effect of osmosis in plant tissue.

    8) Each concentration is performed three times to find an average and obtain reliable results. Make sure the set of three tests for 'A', 'B', 'C', 'D', 'E' and 'F' are performed together to save time. SAFETY: Some safety measures must be adhered to during this experiment.

  2. Investigating The Effect Of Osmosis On Plant Cells And Tissue

    This is because if the potato core is not fully covered by the sucrose solution, the effect of osmosis will not occur to its fullest and I would get different readings (of the mass) for each potato core, which will also make the test unfair.

  1. An Investigation to Determine the Water Potential of a Plant Tissue.

    A previous AS experiment suggests that the concentration of sucrose at this point should lie between 0.2M and 0.4M. Preliminary work What will be the dependent variable? I.e. what is going to be measured? There are many possibilities including mass, length, and volume.

  2. Investigating the Factors affecting the water relations of plant cells.

    A plant cell in a dilute solution 1 Cell wall 2 Cell membrane 3 Nucleus 4 Vacuole 5 Osmosis takes place into the cell: water passes through the cell wall, diffuses through the partially permeable cell membrane and the cytoplasm and enters the vacuole. The cell swells and becomes turgid.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work