• 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...

Introduction

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.

Middle

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.

Conclusion

-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. Marked by a teacher

    How the molar concentration of NaHCO3 (Sodium Hydrogen Carbonate) affects the rate of photosynthesis ...

    5 star(s)

    in the number of bubbles produced when using a 0.1M concentration of NaHCO3. Using the table above, if you double the concentrations the increase of the number of bubbles is from, 491-502 and 484-556. This results in a 2.24% and a 14.87% increase, resulting in an average percentage increase of 8.555%.

  2. Peer reviewed

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

    5 star(s)

    There are wide differences in the strength of the light stimulus in different species. The less rapid the water loss of a species, the less intensely negatively photokinetic that species will be.i Modifications to original method: * After having tried to suspend a projector in a safe and secure way,

  1. 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

  2. Investigation to see the effect of temperature on the expansion of dough.

    Flour was also added and the mixture was mixed, just like kneading when making bread, to make sure the yeast was evenly spread out through the dough. The yeast grows and respires, producing carbon dioxide which makes the dough rise.

  1. Factor affecting the rate of fermentation.

    * Connect the rubber tubes from the boiling tube to the cylinders, make sure the air can be collect in the cylinders. * Label the boiling tube ( which boiling tube is which concentration of glucose solution.) * Pour the different concentration of glucose solution into the boiling tube.

  2. Find out what insulator is the best from cotton wool, bubble wrap and plastic ...

    These results may have been in error because I may have recorded the time at slightly different times when writing down the temperatures. Another reason for the inaccurate results is that I may have moved the thermometer from the middle of the thermometer higher or lower or a little to the left or right.

  1. Determine the water potential of potato tuber cell with the varying affect of solute ...

    In this investigation there are not many variables because most of these factors must remain constant in order to obtain fair results. One variable which is included in this experiment is the concentrations of the solute solutions. Firstly we will have distilled water in one test tube, and then we

  2. Experiment Report on Best Fertilisers

    Why choose Granular? Another important thing that needs to be discussed is why use Granular fertilizer out of a whole range of other fertilizer types. Reasons- Granular fertilizer can be weighted or measured more easily to ensure that one test doesn?t receive more fertilizer then the one next to it.

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