• 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 intensity on the rate of photosynthesis.

Extracts from this document...

Introduction

Owen Davies GCSE Coursework The effect of light intensity on the rate of photosynthesis. Plan: Aim: To investigate the affect of light intensity on the rate of photosynthesis. Theory: Before I predict what will happen I must look at how photosynthesis occurs. Photosynthesis is the way plants create a source of food for themselves. Photosynthesis requires the following resources; Carbon Dioxide, Water and light. Inside the leaves of a plant there is a green substance, this substance is known as chlorophyll. Chlorophyll is in the Chloroplast which are cells contained inside a plant. Chlorophyll absorbs sunlight and then makes the energy from the sunlight available for chemical reactions. This shows that Chlorophyll is used to convert light energy to chemical energy. ...read more.

Middle

The sunlight is absorbed from a green pigment in plants called chlorophyll. The chlorophyll is present within the chloroplast of the leaf cells, which the reaction takes place in. Chloroplasts are small green structures found in the cytoplasm of plant cells. Chlorophyll is the substance that gives plants there green colour. It is able to absorb energy from this light. The water molecules are split into hydrogen and oxygen molecules, the oxygen escapes into the atmosphere while the hydrogen is mixed with the carbon dioxide to create sugar. Prediction: I predict that if there is a higher amount of light intensity on the plant the rate of photosynthesis is going to increase due to there being more energy available to be used to create sugar. ...read more.

Conclusion

3. We shall then set the lamp at 20cm then 30 and so on up to 50cm. 4. We shall do it again to make it fair. 5. We shall then record our results. 6. And then plot our graph. Diagram: By Owen Davies Results: Evaluation: During the experiment I found that my prediction was correct in saying that if there is a higher amount of light intensity on the plant the rate of photosynthesis is going to increase, therefore as the light gets further away from the plant a weaker source of energy will be reaching the plant. Conclusion: To make this experiment better I could have done it more times and I could have used a different plant, this would have helped my results and my graph to show my point. I think the experiment worked fine and it proved my prediction and theory was correct. By Owen Davies ...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. The effect of light intensity on the rate of photosynthesis

    The site of photosynthesis For photosynthesis to occur, carbon dioxide, water and light energy must come together where there is chlorophyll in the flowering plant. Leaves, which are usually broad and flat, are the parts of the plant most suitable for photosynthesis.

  2. 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

  1. Investigating the effect of Light Intensity on Elodea.

    Light energy is in the form of a photon. The energy from a photon is absorbed by the green pigment of chlorophyll and used to transfer electrons from one chlorophyll pigment to the next. This energy is stored as chemical potential energy in the covalent bonds of sugar molecules.

  2. An experiment to investigate the effect of Light intensity on the rate of photosynthesis.

    If there is oxygen being given out then this means that the rate of photosynthesis is faster than that of respiration. This is the oxygen which is later expelled from the plant through transpiration. These reactions also produce ATP, which is the store of chemical energy needed to drive the next stage, the light independent stage.

  1. Investigate the effect of light intensity on the rate of photosynthesis in an aquatic ...

    I will measure the amount of oxygen produced by counting the number of bubbles of oxygen given off by the pond weed within a set time of 3 minutes. I could have measured the amount of oxygen given off by the pond weed another way though, by measuring the volume

  2. How temperature affects the rate of photosynthesis.

    So they collide more often than at 0 oC, and as they collide with energy higher than the activation energy, they are converted into products like the unstable intermediate and triose phosphate respectively, at a quicker rate. This increases the overall rate of photosynthesis and as the rate of the

  1. Water and Marine Resources

    Overfishing herring in the North Sea The herring fisheries of the North Sea illustrate the operation of growth and recruitment overfishing. Between 1950 and 1962 the herring catch remained at about 0.85 million tonnes. However after 1963 fishing increased to produce a peak catch in 1965 of 1.4 million tonnes.

  2. Absorption Spectrum of Chlorophyll.

    These equations are valid for standard square cuvettes with a path length of 1cm. Ca = 11.75A662-2.35A645 (Equation 2) Cb = 18.61A645 -3.96A662 (Equation 3) However since acetone extracts would eat through the 1cm-square plastic cuvettes, 1 cm- circular glass cuvettes had to be used instead.

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