• 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...


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.


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.


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.

    Other factors involved in enzyme controlled reactions are inhibitors and activators, but neither occur in this reaction so the explanation of these factors is unnecessary. The reason the graph started to curve downwards fairly rapidly after the temperature at which maximum rate occurred is due to the denaturing of enzymes.

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

    Light can also travel at various speeds in different media, producing a frequency at which the wave travels. The energy contained in a wave of light is related to its frequency. Where E is energy, h is Planck's constant Energy = (6.626196 * 10^-34 Joule-seconds), and c is the speed of light.

  1. Investigating the effect of Light Intensity on Elodea.

    On the first graph there was one anomalous result: at the distance of 20cm. This is obvious because it did not fit into the curve of best fit. On the second graph there were several anomalous results: at the distances of 10cm, 30cm, and 35cm. The anomalous results were circled.

  2. How temperature affects the rate of photosynthesis.

    Therefore the substrate for Rubisco is carbon dioxide and Ribulose Bisphosphate molecules. As the temperature is increased from 0 oC to 25 oC, the enzyme and both types of substrate molecules gain kinetic energy and start moving faster in the stroma of the chloroplast (the site of dark stage).

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