Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10
  11. 11
    11
  12. 12
    12
  13. 13
    13
  14. 14
    14
  15. 15
    15
  16. 16
    16
  17. 17
    17
  • Level: GCSE
  • Subject: Science
  • Essay length: 2126 words

GCSE photosynthesis coursework

Extracts from this essay...

Introduction

GCSE Biology Photosynthesis Coursework Jasem Alanizy Contents Page Introduction....................................................................Page 1 Aim and hypothesis.........................................................Page 2 Light intensity..................................................................Page 3 Carbon dioxide concentration..........................................Page 4 Continued result and evaluation.......................................Page 5 Effect of Chlorophyll.........................................................Page 6 Continued result and Evaluation.......................................Page 7 The Effect of temperature aim and apparatus....................Page 8 Safety and prediction.......................................................Page 9 Results............................................................................Page 10 Analysis...........................................................................Page 11 Conclusion and Variables.................................................Page 12 Method...........................................................................Page 13 Evaluation and Bibliography.............................................Page 14 Introduction Photosynthesis is the combination of sugar from light, carbon dioxide and water with oxygen being a waste product. This process is possibly the most important biochemical path known. Nearly everything in our everyday lives depends on this process, we would not be alive right now if it weren't for this cycle, this is due to the fact that us humans breath in oxygen and breathe out carbon dioxide, with plants it is the opposite; they take in carbon dioxide and take out oxygen, which we breathe in making it extremely important for us to have plants in order to respire. The process of photosynthesis is a very complex process. Here is a picture of an ordinary leaf. The leaf plays a major part in the process of photosynthesis, as it takes in the light which is later on made to glucose Photosynthesis uses the energy of light to make glucose which keeps the plant alive.

Middle

While the non-green region gives a negative result to the iodine test. This experiment has proved to us that chlorophyll does affect the rate of photosynthesis. 4. The effect of temperature This is my main chosen point of interest throughout the coursework. Aim Our main aim is to find out whether temperature affects the rate of photosynthesis in a Canadian pondweed (this is a picture of Canadian pondweed). Apparatus To undergo the experiment we needed the following items and apparatus: 1. Sprigs of pondweed 2. Boiling tubes filled with water 3. Lamp 4. Thermometer 5. Ice 6. Supply of constant hot water 7. Tissues 8. Ruler 9. Beaker 10. Bubble counter 11. Scissors 12. Tweezers 13. Timer Safety Although this experiment may seem harmless we must take full precautions at all times to avoid any injury possible, below are some things we should bare in mind whilst performing the experiment to avoid serious damage or injury: * Hot water can cause serious injury therefore we must be very wary and attentive to where we pour it. * Scissors can also cause injury hence we should only stick to the task of cutting the pond weed not your partner's hair.

Conclusion

After a period of five minutes we stopped counting the bubbles, the results are available in the results section of the coursework. Here is a diagram of the experiment.. Evaluation I believe the experiment went well just as planned and worked out very well. I am confident about this because the results I got where the pretty much the same as the professional scientific results. I also believe that my results where accurate enough to prove that my prediction was correct. As I predicted that 30°C would be the most suitable temperature for photosynthesis to take place. We can see that this prediction is correct by looking at the graph. The method I used in order to carry out the experiment in my opinion was as fair as possible. I changed the pondweed every time in order to get a fair result, I also used the same volume of water each time to make sure that it does not effect the rate of bubbles released. If I had the opportunity to repeat the experiment I would try to measure the rate of photosynthesis at more temperatures, this would give me a clearer result and will indicate to me perfectly which temperature is most suitable for the most amount of bubbles given of from the Elodea.

The above preview is unformatted text

Found what you're looking for?

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

Not the one? Search for your essay title...
  • Over 180,000 student essays
  • Every subject and level covered
  • Thousands of essays marked by teachers

Related GCSE Green Plants as Organisms

  1. How temperature affects the rate of photosynthesis.

    For the final investigation, 7 different temperatures would be used and the range would be much closer. The temperatures that would be used are- 0 oC, 15 oC, 25 oC, 35 oC, 45 oC, 55 oC and 65 oC. Also no repeats were made for any of the temperature during

  2. Investigation To Find The Effect Of Temperature On The Rate Of Photosynthesis Of Elodea.

    Henceforth it is limited, according to Blackman's Law, by the factor in least supply, either H2O or temperature. however there is a physical limitation of the carbon dioxide diffusion and the plant's sunlight absorption. At a lower temperature, the rate of p/s is increasing with increasing LI or CO2 availability, but the LSP or CSP is quickly reached.

  1. Investigating the abiotic factors that affect the size of Ivy leaves in shaded and ...

    During these reactions the photosynthetic pigments of the chloroplast absorb light energy and give out excited electrons used to synthesise ATP. Water is split by photolysis to give hydrogen ions, electrons and oxygen. The hydrogen ions and electrons are used to reduce NADP and the oxygen is given off as a waste product.

  2. Absorption Spectrum of Chlorophyll.

    nm to (665 ? 3) nm for the four extracts. The spectra in Figure 9 were normalized using Extract 3 as the basis and are shown in Figure 10. The error bars are again not shown for the sake of visual clarity.

  1. Investigating the effect of temperature on the rate of photosynthesis

    However this wasn't very accurate. Therefore in our actual experiment we will use a water bath, as this will keep the temperature constant. We could also use a heat shield. In our preliminary experiment we left the elodea to acclimatise for 1 minute. This may not have been enough time for the experiment to be accurate.

  2. Experiment to Investigate the Effect of Temperature on the Rate of Photosynthesis in Elodea.

    The results were as follows: Table 1: Table to Show Rate of Production of Oxygen at Different Light Intensities Lamp distance from elodea (cm) Number of bubbles 5 84 10 68 15 56 20 40 25 32 30 24 Here is a small graph of the results above: This graph

  1. Peer reviewed

    planning for photosynthesis coursework

    4 star(s)

    I recorded my preliminary results in the following table....... 1st 2nd 3rd Average 1st 2nd 3rd Average 15 264 314 298 292 33 33 33 33 20 208 227 228 221 33 33 33 33 25 196 189 191 192 33 33 33 33 30 109 114 119 114 33

  2. Science Coursework

    Limiting Factors So as the light intensity increases, the rate of photosynthesis also increase until the plant is photosynthesising as fast as it can, we can call this point the LSP point (Light Saturation Point) where the rate of photosynthesis stops accelerating and stays constant.

  • Over 180,000 essays
    written by students
  • Annotated by
    experienced teachers
  • Ideas and feedback to write
    your own great essays

Marked by a teacher

This essay has been marked by one of our great teachers. You can read the full teachers notes when you download the essay.

Peer reviewed

This essay has been reviewed by one of our specialist student essay reviewing squad. Read the full review on the essay page.

Peer reviewed

This essay has been reviewed by one of our specialist student essay reviewing squad. Read the full review under the essay preview on this page.