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

My aim in this experiment is to find out if the amount of light given to a plant affects the amount of oxygen given of in the process of photosynthesis.

Extracts from this document...

Introduction

Photosynthesis Aim My aim in this experiment is to find out if the amount of light given to a plant affects the amount of oxygen given of in the process of photosynthesis. Prediction I think that the rate of photosynthesis will increase as the light intensity increases. This is because light is a limiting factor of photosynthesis and if increased the rate of photosynthesis will increases as well. Because of limiting factors I expect the graph I create to ploto out at at a certain light intensity. This is because when the light intensity increases the rate of photosynthesis will increases to a point were there is no carbon dioxide in the air for photosynthesis to increase any more. I will also be keeping the temperature of this experiment the same. When the temperature increases the enzymes in the chloroplast will work faster making the process of photosynthesis faster and give of more oxygen but if the temperature I did the experiment at was over 45�C photosynthesis would not be able to take place because the active face of the enzymes would have been denatured. ...read more.

Middle

The controlling factors I will keep the same are temperature at 25�C and the amount of NaHC03 at 5%. It is important I keep theses two controlling factors the same to ensure a fair test. Temperature- It is important I keep temperature the same because it is a controlling factor in this experiment. If I increase the temperature the enzyme in the leaf will work faster producing more oxygen. If the temperature is increased over 45�C the enzymes will denature. NaHCO3- it is important I keep this the same to ensure that the plant has the same amount of carbon dioxide to take in. If not it will not be a fair test. Safety There are no risks in this experiment because it is a computer simulation. Apparatus The apparatus I use in this experiment are: Gas syringe, Capillary tube, Elodea (plant), Lamp, Stop watch. Method I moved the lamp closer to Elodea to increase the light intensity and collect the amount of oxygen collected in the gas syringe. I will do this at 10 different light intensities 10,20,30,40,50,60,70,80,90,100 all these are measured in arbitry units. ...read more.

Conclusion

Evaluation The procedure to obtain results was perfect because it was a computer simulation. If I was to do the experiment I would have recorded each result 3 times and taken an average but because it was a computer simulation it would have been pointless because all the results would have been the same. The results drew a perfect straight-line graph with no anomalous results. The results were good enough to write a conclusion. I expect that the reliability of the results to be reliable because it was a computer simulation and shouldn't be wrong. Further work I would do on this experiment would be to do the exact same experiment again using a less concentration of carbon dioxide so I could see a what point the plant ran out of carbon dioxide and the graph ploto out. I will also do the experiment changing the temperature. I would expect the enzyme to denature and photosynthesis to stop at the temperature 45�C. I would expect the amount of oxygen to increase as the temperature increases. This is because as higher temperatures the enzyme would have more energy and speed up the reaction. Up to the temperature of 45�C. ...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. How temperature affects the rate of photosynthesis.

    Place the test tube in the beaker. 7. Place the lamp 50mm away from the beaker and switch it on. 8. Using the stop clock, let photosynthesis take place for 5 minutes. 9. During the 5minutes, count the total number of bubbles produced by the elodea and note down the results.

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

    Another experiment using almost identical apparatus would be to vary the color of the light the plant absorbs. This could be varied by using translucent color filters in front the lamps. Since light wave length has already been identified as a variable of photosynthesis, it would be interesting to actually test it.

  1. INVESTIGATING HOW TEMPERATURE AFFECTS THE

    When using the colour meter I will measure the absorbency of the distilled water and then compare this to the different beetroot concentrations. I will then need to measure the solutions against a colorimeter I will use a colorimeter rather than a chart as the sensor is sensitive to light

  2. An experiment to see how light intensity affects the photosynthesis of a plant.

    Then repeat all the readings a second time in order to obtain an average result for each distance. The variables I will change are the input and the output variables, the input being light intensity and the output being the volume of oxygen that is produced.

  1. Find out how the amount of light, that is light intensity, affects the rate ...

    If Elodea is put in tap water, then the chlorine in tap water might kill the enzymes. I need a beaker because I can put the Elodea and the water into the beaker and I can do my experiment by counting the number of bubbles and the beaker helps me do this and help keep the contents in the beaker.

  2. The aim of our investigation is to find out how the amount of light, ...

    If Elodea is put in tap water, then the chlorine in tap water might kill the enzymes. I need a beaker because I can put the Elodea and the water into the beaker and I can do my experiment by counting the number of bubbles and the beaker helps me do this and help keep the contents in the beaker.

  1. Investigation To Find Out How Amount of Light Affects Photosynthesis.

    Safety glasses must be worn at all times. ANALYSING EVIDENCE Results: Table of results: Distance From Test-tube (cm) 0(almost touching) 10 20 30 40 50 Temperature (oc) 30 29 29 28 27.5 26 Bubbles 84 53 21 24 20 15 Bubbles 73 54 32 41 21 20 Bubbles 70 60

  2. Photosynthesis.In this experiment that is what I am testing for, the more oxygen produced ...

    We will time all to 10 minutes. We will only use one plant, to make sure it is still a fair test. There are a number of variables that must be considered in this test. There will also be a slight margin for human error but all will be done precisely.

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