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

Plants take in carbon dioxide and realise oxygen using photosynthesis so I am trying to determine the rate of photosynthesis. In this experiment I will investigate how sodium hydrogen carbonate affects the rate of photosynthesis.

Extracts from this document...

Introduction

Aim Plants take in carbon dioxide and realise oxygen using photosynthesis so I am trying to determine the rate of photosynthesis. In this experiment I will investigate how sodium hydrogen carbonate affects the rate of photosynthesis. Apparatus Needed * Glass Funnel * Desk lamp * 1 Litre Beaker * Test tube * Aquatic Plant (Canadian Pond weed) * A ball of plasticine * Sodium Hydrogen Carbonate * Razor Blade * Bench lamp with a 40W bulb * 30cm wooden ruler * Clock * Stirring rod Using the Apparatus * I will follow all the lab safety rules e.g. no running, no back packs etc) * I will have to keep the lamp away from making contact with any water or moisture. * When using the razor blade I must take extreme caution as it can easily cut my finger or cause harm to others. Fair Test To ensure that a fair test is carried out I will follow the following points promptly. ...read more.

Middle

Carbon dioxide is quiet important for Photosynthesis the formula below shows how is works:- So I think the two main factors in this experiment that effect the rate of photosynthesis are the amount of energy produced by the light and the amount of carbon dioxide available to the plant so when the carbon dioxide starts running out the amount of oxygen produced will start dropping so as the level of sodium hydrogen carbonate increases the amount of oxygen produced will increase. Method * I will fill a 1 litre beaker 3/4 full with water and dissolve a fixed concentration of sodium hydrogen carbonate in it, I will use the stirring rod to help dissolve the sodium hydrogen properly. For this experiment I will be using 4 different quantities of sodium hydrogen carbonate. One concentration per experiment. o Normal No Concentration o 0.0100 mol dm-3 o 0.0125 mol dm-3 o 0.0250 mol dm-3 o 0.0500 mol dm-3 * Using a razor blade I will cut five equal size portions from the Canadian Pond weed, each from the top end of a different shoot. ...read more.

Conclusion

The results I gathered were pretty much the expected results I believe one of the key features of the success of the results was the fresh Canadian pond weed I used as in the past I have heard numerous stories about other types of pond weed such as 'Elodea' not producing the rate of photosynthesis properly because the don't last fresh for long. I also calculated the average of the results and the answers were not very different, making the results even more reliable. But I had to keep in mind that there are a few variables that could have made my experiments results wrong or different such as the heat of the bulb increased as I left it on for longer, it is a common known fact that the increase in temperature could also affect the rate of photosynthesis but I believe even if it did affect the results they would not be much different then they the correct results. Biology Coursework BY Mohammed Umar ...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

    Biology Coursework : Rate of Photosynthesis

    3 star(s)

    The temperature can be kept somewhat a constant by performing the experiment in one session, when the air temperature shouldn't change enough to affect water temperature. A transparent glass block will also be placed in front of the lamp to retain some of the heat from the lamp.

  2. Marked by a teacher

    Factors That Affect the Rate of Photosynthesis

    3 star(s)

    -Position of light censor: This is also an important variable because the different positions of the censor can give us different intensity, the closer it is the higher, the further away, the lower, therefore, the position must not be changed throughout the whole experiment.

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

    Hypothesis: The more carbon dioxide there is, the more oxygen will be produced therefore increasing the rate of photosynthesis. This will take place until saturation, which is when the reaction will be taking place at its maximum. It is known from theoretical study that if the carbon dioxide is doubled,

  2. Investigating the effect of temperature on the rate of photosynthesis

    carbon dioxide and RuBp, this will be done slower than at a higher temperature. Therefore the whole calvin cycle will be completed at a slower rate. When the elodea is in water with a temperature of 15oC I predict the rate of photosynthesis will increase from when it was in 0oc.

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

    2H+ + O2 + 2e- The oxygen produced from the photolysis is a waste product of photosynthesis and is not needed for any reactions in the plant. For this reason the oxygen is emitted as a gas. The P700 of photosystem I absorbs electrons from photosystem II.

  2. Three separate experiments which are to be carried out to investigate a plant's unique ...

    divisible by 4), evaporating dish, water, Vaseline, scalpel (to remove the leaves). Diagram: A - Thistle funnel B - Laurel cut-off holder C - Laurel cut-off D - Evaporating dish full of water E - Capillary tube F - Ruler to measure distance bubble travels We will be very vigilant when inserting the Laurel leaf into the cut-off holder.

  1. Investigate the factors, which affect photosynthesis.

    To be specific I have names these in the list below: * www.s-cool.com * www.gcsehelp.com * Stratford Library. * Co-ordinated Science. Biology for Higher Tier. Brian Beckett and Rosemarie Gallagher. 2001 * www.encater.com Factors that affect photosynthesis. Carbon Dioxide Aim In this part of my coursework my aim is to

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

    is a smaller chance for human error when counting within a smaller time frame. If the capillary tube option was to be chosen, volume should be measured for a smaller time frame to reduce the overall time to complete the experiment.

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