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Data Analysis - Osmosis in Potatoes

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  • Essay length: 1548 words
  • Submitted: 27/10/2011
  • Reviewed by: (?) skatealexia
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GCSE Life Processes & Cells

Peer review rating

5 star(s)

read the full review

The first 200 words of this essay...

G.C.S.E. Biology Data Analysis - Osmosis in Potato Chips

Contents Page

1. Aim.............................................................................................................. 3

2. Results........................................................................................................ 3

2.1 Tables

2.2 Graphs

3. Analysis....................................................................................................... 5

4. Evaluation................................................................................................... 6

5. Conclusion.................................................................................................. 7

6. Bibliography................................................................................................ 8

1. AIM

The purpose of this experiment was to analyse the effect of osmosis in potato chips (cut slices) and then be able to explain the significance of this in the human body. I predicted that as the concentration of the solute was increased, the mass of the potato would decrease because of osmosis.

2. RESULTS

2.1 Tables

Potato No.

Concentration (M)

Start mass (g)

Finish mass (g)

Change in mass (g)

% change in mass

Average % change in mass

A1

0.0

1.79

2.01

0.22

12.29

9.68

A2

0.0

1.79

1.94

0.15

8.38

A3

0.0

1.79

1.94

0.15

8.38

B1

0.5

1.79

1.86

0.07

3.91

5.40

B2

0.5

1.79

1.93

0.14

7.82

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Review of essay

Reviewed by: skatealexia

Rating: 5 star(s)

Response to the question

An excellent piece. Whilst the introduction could do with some minor points which are described below, the main body of text including the evaluation and analysis are done to an exceptional standard including accurate scientific reasoning behind their results. The candidate conveys scientific concepts with clarity and the whole piece is done to a much higher standard than I would expect for GCSE level.

Level of analysis

The aim is set out concisely and tells us exactly what the candidate is intending to do, but it lacks some definite information on the experiment because the candidate does not say if the concentration of solute is at the outside or inside the potato and so forth, so it would be hard to grasp the clients meaning, so they should state this more clearly. The candidate did not include a method which should have been included as it makes it harder to interpret their results table. Also, if a method was included, the candidate could have discussed the factors which may have affected the experiment and how they avoided this which would show their understanding of the experiment and of osmosis. The candidate includes a well labelled clear graph which is very good to see. The candidate analyses the experiment very well in their analysis showing great scientific depth in their thinking and using very good images to support their text. The candidate suggests some improvements in their evaluation, but I would like to see a couple more errors and considered improvements and how the errors may have affected the experiment for them to get a higher mark. The candidate shows thinking in how they could expand on the experiment which is very good for GCSE level.

Quality of writing

The letters in the introductory page are all jumbled up, but this could be due to the width of the PDF file. Spelling, grammar and punctuation to a high standard. Layout flows well and looks professional.

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