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

Investigating the relationship between diffusion and Size of the Cell

Extracts from this document...


Investigating the relationship between diffusion and Size of the Cell Aim: To confirm the relationship that diffusion of chemicals depends on the ratio of surface area: volume. Hypothesis: I believe that the rate of diffusion will decrease with the increase in the volume of the cell. Fair Test: - Two agar cubes were used for each of the two volumes so that more accurate results could have been obtained. - All agar cubes were of the same size, this was done by using a ruler when cutting the agar. - All jelly samples were taken from one whole jelly container so the cells will be similar and the depth would remain the same. - The temperature will remain the same for all beakers. Safe Test: - We will be using scalpel to cut the jelly therefore we made sure we handled them with care - We made sure we used the beakers appropriately, so that they did not brake and cause any damage. ...read more.


Make sure to add on the extra seconds accordingly for each test tube after taking down the results. 6) Keep observing each beaker and stirring them at the same time. 7) When the cubes have turned colourless notes down the time taken. 8) Add the extra seconds on accordingly and arrange a table for the results. Observation: Results table: Table Showing the Time Taken For Diffusion In the Different Size Of Agar cubes Cube Size (cm) Time Taken (sec) Average (sec) 1cm by 1cm i. 470 ii. 495 482.5 0.5cm by 0.5cm i. 236 ii. 244 240 Graph: Analysis & Conclusion: Looking at our graph we can see that as there were just two set of results obtained there were no anomaly and by looking at the graph we can see that our hypothesis was also proved correct because as the cube size increases the time taken for diffusion also increases. ...read more.


Another error found was that when cutting the agar pieces the length may have been slightly off, again this small error can change the whole results. The other error found was that when starting the stop watch it was never started at exactly the same time the acid was put into it, this could lead to small errors . Also when adding the acid after every five seconds most of the time the acid was not put in on exactly the right time, but again this is not such a big error that it can change the results. If I were to this experiment again I would use a cutting mechanism that cuts out equal part of the agar, and due to time restraints the results had to be obtained all at once, so by doing this experiment again I will make sure that I did each set of results at a time so that minimal error will be found. ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology 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 International Baccalaureate Biology essays

  1. Marked by a teacher

    Investigating the relationship between cell size and rate of diffusion

    Apparatus: 3 agar cubes containing pH indicator Sodium Hydroxide solution Glass beaker/s Clock/ timing device Ruler/measuring device Safety glasses Method: 1.Cut out a 1 cm (2x), a 2 cm, and a 3 cm cube from the large piece of agar jelly using a knife.

  2. Biology - Observing the Process of Guttation

    Figure 2. Figure 3. Day 6 of plant A in its Day 8 of plant B in its Day 13 of plant C in its enclosed container enclosed container enclosed container (two layers of saran wrap). (plastic container with lid).

  1. Reaction Time

    The hypothesis will then be: "People who carry out sports should have a faster reaction time than those who do not". This is based on the previously named investigations that have been made concluding the same result as this hypothesis.

  2. Surface Area to Volume Ratio Simulation Experiment. The comparison between surface area : volume ...

    150 : 125 = 1.2 : 1.0 5. 100 : 62.5 = 1.6 : 1.0 Example calculation for time taken for agar blocks to decolourise * Data obtained from Table 1.2, agar block number 1. s Graph 1.1: Averaged time taken for agar blocks to decolourise Conclusion From the results obtained above, it is agreed that a larger

  1. Modelling Surface Area to Volume Ratio in Cells with Agar Cubes

    A larger block has a smaller amount of surface area in relation to its size so it should take longer for the hydrochloric acid to diffuse into the centre of the cube. The actual rate of the hydrochloric acid diffusing through the agar should be the same for all the

  2. How does the distribution of Plantago maior differ?

    15 8, on asphalt, Plantago Major are small, damaged 1 6 11 2 2 7 3 3 10 4 2 10 5 1 23 6 2 6 7 5 5 8 4 5 9 1 7 10 3 13 11 1 17 12 1 6 13 1 4 14 2

  1. Determining the relationship between sample size and margin of error

    33.3 3 20 4 100.0 150 33.3 4 25 4 125.0 150 20.0 5 30 4 150.0 150 0 4 1 10 1 200.0 150 33.3 2 15 2 150.0 150 0 3 20 4 100.0 150 33.3 4 25 3 166.7 150 11.1 5 30 4 150.0 150 0

  2. Genetics NOTES

    same gene - Phenotype is the physical appearance of an organism for a particular characteristic - Genotype is the genes for a particular characteristic present in an organism - Homozygous is an organism with the same genes for a particular characteristic - Heterozygous is an organism with different genes for

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