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

How Environmental Factors Affect the Rate of Photosynthesis

Extracts from this document...

Introduction

How Environmental Factors Affect the Rate of Photosynthesis Aim In this investigation I am trying to find out the effect of environmental factors on the rate oh photosynthesis. We will do this by varying the amounts of light and sodium hydrogen carbonate the plant receives. Research I have found out that the concentration of carbon dioxide in the air doesn't change much from area to area, but the amount of light, water and the temperature varies from day to day and season to season in different places. On a warm summer day, light and temperature are generally well above the needed level and so carbon dioxide is limiting the amount of photosynthesis which can take place. In the morning, evening or winter the temperature and light is limiting how much the plant photosynthesises. Plan The light test Set up the equipment as shown below Start with the lamp 10cm away from the beaker Turn it on and count how many oxygen bubbles are made during a minute Move the lamp 10cms further away (now 20cm from beaker) ...read more.

Middle

Sodium hydrogen carbonate (baking powder) This will be used to record how the amount of sodium hydrogen carbonate used will affect the plants rate of photosynthesis. Scales We will use these to measure the amounts of baking powder we are using. Fair Test This will be made a fair test by the fact that when doing the sodium hydrogen carbonate test the lamp will always be 5cm away, so that this won't be affecting the rate of photosynthesis as well. We will repeat the light test 2 times so that we make sure it is being done properly. We will use different people within our group to do different tasks so that it is timed and carried out accurately. Prediction I predict that as the lamp is moved away from the beaker less oxygen bubbles will be produced. I think this because photosynthesis needs light to take place and if the bulb is closer the intensity of the light is greater so the plant will have more energy to photosynthesise. ...read more.

Conclusion

See attached sheets Conclusion My results show that as more sodium hydrogen carbonate is added the Elodea gives off more oxygen bubbles because carbon dioxide is needed for photosynthesis. As the lamp is moved farther away less oxygen bubbles are given off because intense amounts of light are needed for the plant to photosynthesise, though at a certain point I don't think the plant would photosynthesise any more even if it was given more light because there wouldn't be enough carbon dioxide around to let it photosynthesise. Evaluation If I was going to do the experiment again then I would have done the sodium hydrogen carbonate test more than once to get more accurate results. I may also use a different method to obtain the results, for example I might do it using the apparatus and set up shown below. I may also have some way of putting carbon dioxide in the air because the amount the plant is photosynthesising may be limited by not enough carbon dioxide even though there is plenty of light. ...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.

    One way of rectifying this problem is to have one person to do the experiment and another to do the timing. However, the errors caused by the timing would be very minor and relatively insignificant so the method used was most practical.

  2. Investigate the factors, which affect photosynthesis.

    Prediction My prediction is that the more intense the light, or more the chlorophyll, water and carbon dioxide the faster the rate at which photosynthesis is carried out. In other words I think the greater the light intensity, water, chlorophyll or carbon dioxide the greater the rates of photosynthesis.

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

    These other factors do not immediately limit the rate of photosynthesis but rather gradually. As light intensity increases the photosynthetic rate is being limited by certain factors such as carbon dioxide and temperature. As light intensity increases further, these factors limit the rate of photosynthesis even more until photosynthesis is completely limited and the graphed line become horizontal.

  2. Investigating the abiotic factors that affect the size of Ivy leaves in shaded and ...

    Animals eat the plants, and we eat animal products as well as plants. The light used in photosynthesis is absorbed by a green pigment called chlorophyll. Each food-making cell in a plant leaf contains chlorophyll in small bodies called chloroplasts.

  1. How temperature affects the rate of photosynthesis.

    made when the light intensity changed and might have had an affect on the rate of photosynthesis.) 12. Allow the Elodea to acclimatise to for 2 minutes. (Allowing acclimatising time to the elodea would ensure that the elodea gets accustomed to the new light source and the new surrounding temperature.)

  2. What factors affect the rate of photosynthesis?

    will not allow carbon dioxide to have any more effect on the rate. Water is also a factor of photosynthesis that will change its rate. If a plant has little water then the plant will become flaccid. By doing this it will close their stoma which means that oxygen cannot be released and carbon dioxide cannot enter.

  1. To investigate certain factors which affect the rate of photosynthesis in plants and how ...

    a result of the size and structure of their leaves and roots. Some plants will have leaves with a large area which will contain more chloroplasts than others. The more chloroplasts there are the more light energy that can be absorbed and therefore the faster the rate of photosynthesis.

  2. Investigate the factors that affect the rate of photosynthesis on a green plant.

    Therefore leading in little CO2 being able to diffuse through. Clearly, in a water plant, like the pondweed, as long as the plant is fully submerged in water at all times, this will not be a problem. Chlorophyll is the molecule that absorbs sunlight and uses its energy to synthesise carbohydrates from CO2 and water.

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