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

The effect of light on the rate of photosynthesis.

Extracts from this document...


Biology Science Investigation: The effect of light on the rate of photosynthesis. When you turn the lamp on, the plant produces oxygen bubbles. The graph shows that when the lamp is close to the plant (15cm or less) the number of bubbles produced is high (between 60-65). After 15cm the graph falls rapidly to below 15 bubbles produced gets smaller as the lamp moves further away. ...read more.


Therefore the higher the results on the graph (number of oxygen bubbles) the faster plant are photosynthesis. Evaluating The method used was quite good for a simple experiment. But it doesn't give a completely accurate result because the student may not be able to count all the oxygen bubbles produced. You could use an oxygen probe to measure the amount of oxygen more accurately. The anomalous results 5 bubbles in the first count when the lamp is 20cm away from the pondweed. ...read more.


These results may have occurred if the student miss counted or the equipment was set up incorrectly so as to let air in and oxygen bubbles where gained or lost. To prevent this two or more people could count or the equipment could be checked more thoroughly. These results are reasonable reliable as they come out as predicted the method is also tried and tested one which produces accurate3 results almost every time. Further work to extend the investigation could be repeating the test more times and also you could do the test using different coloured light filters to see the effect this has on photosynthesis. ...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. Marked by a teacher

    An investigation into the effect of a germination inhibitor on the germination of seeds.

    3 star(s)

    of oxygen available are also key factors that germination The amount of water each Petri dish received could have been a limitation on the growth of the seeds, as perhaps it was not a sufficient amount for all the seeds to .

  2. How temperature affects the rate of photosynthesis.

    The heat provided by the lamp could also have affected the overall temperature of the apparatus especially during low temperatures where it could have caused the ice to melt and provide a need to maintain the temperature using human judgement which cannot be 100% accurate.

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