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

The effect that chlorophyll has on the rate of photosynthesis in elodea.

Extracts from this document...

Introduction

The effect that chlorophyll has on the rate of photosynthesis in elodea Prediction I predict that the larger the amount of chlorophyll (size of plant). The more oxygen will be produced therefore the more photosynthesis will occur. The Graph shows that there is a steady increase in photosynthesis and there is no optimum. Theory and background Sunlight CarbonDioxide+water=========Glucose+oxygen Chlorophyll 6co2 + 6h20 ==========c61206 + 602 When plants make Carbohydrates they combine Carbon dioxide and water to make glucose and oxygen. Energy is needed to make them combine. Plants use sunlight, But with just sunlight water and carbon dioxide mixed together will not react. ...read more.

Middle

0.5g of sodium hydrogen carbonate (NaHCO3) was then added it was left to equalise for about 2minites then A stopwatch was started and bubbles counted for 1minites. This was repeated 2 more times. Then the elodea was taken out and cut 2cm shorter to 8cm and placed with new water in the test-tube along with another 0.5g of sodium hydrogen carbonate. Once again it was left to equalise then the bubbles were counted and repeated. The experiment was then done for measurements of 6cm, 4cm, and 2cm. The results for each length were then averaged and a graph and results table drawn. ...read more.

Conclusion

the more bubbles (oxygen) is produced. We can display these results in a graph. A graph to show the amount of oxygen produced by a plant. Conclusion I have found out that the more chlorophyll there is the more oxygen is produced. This statement supports my prediction. Evaluation To improve this experiment, I would repeat it so I got a more accurate average. I also would have collected the oxygen and measured the volume as bubbles are irregular sizes so it is not accurate. The water in the test-tube could have been measured more accurately using a burette. Tom Honey 10 ...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 Green Plants as Organisms 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 Green Plants as Organisms essays

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

    These electrons are absorbed by electron acceptors and pass along chains of electron carriers leaving the photosystems positively charged. These electrons need to be replaced immediately so that the pigment can be returned to its stable state. For this reason, water is photolysed producing two electrons as shown below: H2O

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

    opposite of that of animals; however this does not mean that green plants do not respire. During daylight, plants photosynthesise and respire at the same time, hence all CO2 produced by the plant during respiration is transformed into O2 and food (and thus energy)

  1. How temperature affects the rate of photosynthesis.

    Significant limitation: The most significant limitation was the elodea itself: It was planned that the same elodea length would be used for all the repeats at a given temperature. This proved unreliable because firstly using different elodea from different parent plants for each different temperature because the changes in the

  2. Absorption Spectrum of Chlorophyll.

    All green plants contain chlorophyll a and chlorophyll b in their chloroplasts. Chlorophyll b differs from chlorophyll a by having an aldehyde (-CHO) group in place of a methyl group (-CH3) (Gross, 1991). This aldehyde group is also the reason that chlorophyll b has a greater molecular weight than chlorophyll a.

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