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

Investigation into the effect of light intensity on the rate of photosynthesis.

Extracts from this document...

Introduction

Investigation into the effect of light intensity on the rate of photosynthesis. Prediction I predict that the amount of oxygen produced will increase as the light intensity increases. "Sometimes light is a limiting factor. A plant may have lots of water and carbon dioxide, but it will not photosynthesise very fast if there is not enough light; increasing the light intensity will make photosynthesis faster." Concluding from this statement, light is one of the requirements of photosynthesis, so moving the light source closer and further away from the plant will give it varying degrees of light intensity. As the light is moved closer to the plant photosynthesis will speed up and eventually come to its highest point and level out. As the amount of carbon dioxide and the temperature also affect the plants rate of photosynthesis, the plant may have plenty of light but "cannot photosynthesise because it has run out of carbon dioxide or it is to cold for the enzymes to work properly." That's why it may level off. ...read more.

Middle

* Safety. I will make sure that the tank of water is not near any electrical appliances. I will also make sure the area around the experiment is clear and that there is nothing dangerous on the floor. * I will record my results in the following table: Test Distance of lamp away from beaker Volume of oxygen (mm) 1 2 3 1 2 3 1 2 3 1 2 Etc. Once I have collected all my results I will plot them on this graph to get the rate of photosynthesis, and how it differs when the lamp is moved. I am going to put all the results on one graph so it is easier to compare them and write up an evaluation. Amount of Oxygen Produced (MM) Distance of lamp away from beaker Results I was unable to conduct the experiment in the laboratory because there was not enough oxygen produced to make the results reliable Test Light intensity (%) ...read more.

Conclusion

Conclusion As the light intensity is increased the rate of photosynthesis also increase, so my prediction at the beginning of the experiment is correct. I also predicted that the rate of photosynthesis would come to its highest point and then level out. This is because the plant has plenty of light but it will eventually run out of carbon dioxide to photosynthesise any more. This theory also includes temperature and light, along with carbon dioxide they are the "limiting factors" of Photosynthesis. My graph did not level out because it always had plenty of carbon dioxide. Evaluation To evaluate my experiment I would say that it went well, but would have liked to carry out the experiment instead of using the computers. In my results table I found I needed to add an extra column entitled "rate of photosynthesis" so I was able to use that information later in my graphs. I also found it easier to use two graphs instead of one, as I used ICT to make my graphs. ...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)

    accept the hypothesis, so for these seeds: There is a relationship between germination inhibitor and the germination of seeds - the higher the inhibitor concentration the less seeds germinate. Days 1 and 6 were chosen for chi-squared because they are the first and last days of the experiment and so

  2. The effect of light intensity on the rate of photosynthesis

    Flowering plants have a green pigment called chlorophyll which can absorb some of these light rays and use their energy to build up the simple sugar, glucose , from carbon dioxide and water. The light energy is trapped as chemical energy in the glucose molecule.

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

    1 2 3 ave Volume of oxygen bubble (mm3min-1) 5 1 2 2 2 3.14 10 7 9 7 8 12.6 15 19 14 12 13 23.6 20 18 19 19 19 29.8 25 26 25 27 26 40.8 30 24 45 43 44 69.1 35 38 37 40 38 59.7 40 28 30 30 29 45.6 45 8

  2. Investigating the effect of Light Intensity on Elodea.

    Chlorophyll is pigmented green. Light is an input of photosynthesis, the light energy is used to form bonds between carbon dioxide and water, producing oxygen. Oxygen bubbles are the product of photosynthesis. As light intensity increases, so does the rate of photosynthesis and more bubbles are given off as a product of the reaction.

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

    Hold test tube up with stand and clamp, and hold elodea upside down by putting it inside the tubing. Pull through any bubbles before starting the experiment. This is done so that no excess bubbles are already there, which will make the experiment inaccurate.

  2. How temperature affects the rate of photosynthesis.

    oxygen production very significantly and therefore had an equal or a similar affect on the rate of photosynthesis. Discussion: Between 0 oC and 35 oC, the average rate of oxygen production and therefore the rate of photosynthesis increased as the temperature increased.

  1. 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.

  2. An Investigation into Species Diversity with distance along a Pingo.

    Most enzymes have an optimum pH around neutral. The hydrogen ions in any solution interact with the R-groups of the amino acids in the enzymes. This interaction affects the way in which the R groups bond with one another, and subsequently effects the 3D arrangement of the active site.

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