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

The Effect of Carbon Dioxide Concentration On The Rate of Photosynthesis.

Extracts from this document...


Sophie Louise Beard The Effect of Carbon Dioxide Concentration On The Rate of Photosynthesis Aim To investigate the effect of carbon dioxide concentration on the rate of photosynthesis. Prediction I predict the higher the carbon dioxide concentration (sodium hydrogen carbonate solution concentration) the faster and higher the rate of photosynthesis will increase meaning more oxygen produced (more O bubbles given off) over a period of time [2 minutes]. The amount of carbon dioxide taken in I predict will be proportional to the amount of oxygen given out. E.g. 6CO +6H O --> C H O +6O As the amount of CO O I predict the graph will look something like this At the end of the graph, it will eventually level off and stop producing oxygen due to the limiting factors. Diagram Variables Things we could change which would effect our results are -: * Amount of light intensity * Amount of carbon dioxide(sodium hydrogen carbonate solution molar) * Different conditions (temperature) ...read more.


My results make a positive correlation curve; the class results make a positive correlation straight line. This is more accurate. Looking at my results, it appears my prediction was partly right, the higher the concentration of sodium hydrogen carbonate solution, the higher the rate of photosynthesis. My graph to my results is a positive correlation curve showing the higher the concentration of sodium hydrogen carbonate solution, the higher the rate of photosynthesis, which is what I predicted. But I also predicted the rate of photosynthesis would be to the concentration of sodium hydrogen carbonate solution. As my graph is a curve and not a straight line it doesn't show this but I think if the experiment was done more accurately and fairly it may have shown this. The class results graph is a straight line in positive correlation, these are more accurate and also agree with my prediction. The class results show my theory was correct (see prediction) but it is constant and doesn't level off, this is because the limiting were kept constant and just right. ...read more.


-The bubbles may have been coming too fast to count -The bubbles may have contained other things other than oxygen -The bubbles may and more than likely was not all the same size each time. The class results were more accurate and fair probably because they were an average of a lot more. If I would repeat this experiment again I would use a gas syringe to collect up the oxygen produced. This would measure the volume of oxygen collected over a period of time much fairer and more accurately than counting bubbles. We can't be sure the size of each bubble is the same but this would measure the volume exactly. If I was to re-do my experiment using the gas syringe it would look like this- I would follow my procedure as before but instead of me counting the gas would be collected in the syringe and I would work out the average volume collected over a period of time not the average amount of bubble over a period of time. ...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

Here's what a teacher thought of this essay

4 star(s)

A good plan and clear understanding of relevant theory shown. Occasionally more precise use of scientific terms would have been helpful.

Marked by teacher Adam Roberts 05/07/2013

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. Peer reviewed

    An Investigation into the Effects that Different Light Intensities have on the Speed of ...

    5 star(s)

    Woodlice therefore will tend to congregate in cooler, darker and more humid regions, where their water loss will be lower.ii Although light does not affect the physiological state of woodlice in the same way as humidity and temperature, it plays a very important part in woodlice behaviour.

  2. Experiment to investigate the effect of Carbon Dioxide on the Rate of Photosynthesis

    Enzymes are susceptible to a process known as saturation. This is because enzymes work by bringing two substrates (in this case RuBP and co2) together. In simple terms this relates to the fact that at any given time one enzyme can only accommodate one reaction between the two substrates, so

  1. Factor affecting the rate of fermentation.

    Method 2 (improvement): Preparation: * Draw a result table. * Tie back long hair. * Wear lab coats and goggles if it's necessary. * Set up the apparatus as the diagram has shown. Technique: * Measure 3g of the yeast on the filter paper. * Mix water with glucose solution (2 moles ), to dilute it into 0.5 Mole, 1.0 Mole and 1.5 Mole.

  2. Investigating the Factors Affecting Respiration in Yeast.

    Another way the yeast could have survived until 60oC is by somehow creating a favourable environment for itself that it was able to exist in for awhile. 3. This could have happen quite easily, except for the fact that I knew that this could occur without difficulty so I tried

  1. Find out the effect of temperature on the bounciness of a ping-pong ball.

    for five minutes. Then bounce it from 1 meter and check how high it bounces back. Do this three times and record each reading. Results: Temperature (Degrees Celsius) The Height of the ball bouncing back (cm) Try 1 The Height of the ball bouncing back (cm)

  2. What are the best conditions for the germination of mung beans?

    The color of the testas were also a much darker shade of green in comparison to the beans in the original package, as well as the rest of the beans in other Petri dishes. Day 2: White radicles have started to protrude the seed skin, no plumules are present in

  1. What effect does the sucrose concentration have on osmosis?

    The size should be big enough to notice a result in mass after the experiment. I will control this variable by cutting and measuring the mass on weighing scales. 2. Sucrose Concentration: The concentration of the sucrose should not be too high otherwise the molecules of the potato will move

  2. Investigating the effect of concentration of sugar on the respiration rate of yeast

    Results: Number of CO2 bubbles released per min 1 2 3 4 5 1 *16 18 14 10 14 2 23 16 15 12 16 3 24 15 17 12 13 4 23 15 16 10 12 5 23 12 16 14 12 Average 23 15 16 12 13 *

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