• 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. Marked by a teacher

    Investigating Factors Affecting the Rate of Photosynthesis.

    5 star(s)

    will affect the rate of photosynthesis. In this next experiment, I recorded the number of oxygen bubbles given off in a given time at various light intensities. Preliminary results Distance (Cm) Number of bubbles per minute 5 47 10 40 15 36 20 32 25 30 30 24 35 20 40 17 Although this preliminary investigation

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

    Another problem with the experiment could have been the Elodea being forced to photosynthesise too much. This could have damaged the plant, more likely at the higher temperatures, and therefore subsequent readings may not demonstrate a true pattern of the rate of photosynthesis at different temperatures.

  1. 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.

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

    When enough light energy has been harnessed at a reaction center, ATP can be synthesized from ADP. During this reaction, oxygen is produced as a by-product and it is the oxygen bubbles that are being measured in the experiment. The greater the light intensity, the more light energy that can be transferred and harnessed to fuel reaction in photosynthesis.

  1. Investigate the factors, which affect photosynthesis.

    The process of the starch test is shown below: Background information There are many different types of leaves; they are called evergreen, monocot, succulents and pin variegated. Simple demographic carnivorous and compound stages of evolution are going through these leaves.

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

    Insert plunger just inside barrel of device and gently shake mixture for 30 seconds. Press the plunger down slowly until it touches the mixture, place on the cap and screw down slowly until you see the solution filter into plunger.

  1. Find out what factors affect the rate of photosynthesis. Rate being the amount of ...

    Therefore if my results are according to distance vs. rate of photosynthesis, I predict the graph will be a negative curve. Without sunlight a plant does not grow and will die. This is because the sunlight is the source of energy that the plant needs.

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

    This is because chlorophyll reflects green light. White light is absorbed best because it contains both blue and red light. Preliminary Experiment: Aim To find out what colour of light is best to use in my main experiment. Prediction I predict that I will find out that white light is the best colour to use.

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