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

An Experiment To Investigate The Amount Of O Given Off By Elodea With Varying Concentrations Of NaHCO

Extracts from this document...

Introduction

An Experiment To Investigate The Amount Of O Given Off By Elodea With Varying Concentrations Of NaHCO Aim- To investigate the amount of O given off by the Elodea with varying amounts of concentrations of NaHCO . The rate of photosynthesis is measured by counting the number of bubbles of O being produced during that process. Introduction- Photosynthesis is the process in which plants take in energy from the sunlight. It is then converted into food energy. It is responsible for all carbon compounds in living organisms. When a plant cell absorbs the suns light, H O and CO it gives out oxygen and glucose. Graphs to show photosynthesis- This graph shows that the light intensity speeds up photosynthesis, but only to a certain point, and beyond that the increase of light intensity has a small effect. ...read more.

Middle

The CO varies due to the changes in the NaHCO solution concentrations. Variables, Affecting Photosynthesis: - CO - H O - Chlorophyll - Light - Temperature Prediction- The greater the sodium hydrogen carbonate solution concentration, the greater the rate of photosynthesis. The sodium hydrogen carbonate solution concentrations doubles so also the rate of photosynthesis will. When there is less concentration of carbon solution then the bubbles will be quicker and there will be more of them. So photosynthesis is quicker and more oxygen is produced. Equipment: - Pond weed (Elodea) - Beaker - Sodium hydrogen carbonate solution (NaHCO ) various amounts- 0.000M, 0.025M, 0.050M, 0.100M, 0.200M, 0.400M. - Light (lamp) ...read more.

Conclusion

My results get faster as there was more sodium hydrogen carbonate used. A few of my results don't follow the others, so they don't support my prediction because they are not as close to the line of best fit; this might be because the concentration of sodium hydrogen carbonate was measured wrong. Improvements/sources of errors- The graph curves to the left like it supposed to because the higher the concentration the more amount of bubbles dispersed. The few odd results which aren't near the line of best fit are wrong due to human error either using the wrong amount of concentration or the bubbles might have been counted wrong or the elodea was damaged so didn't produce the right amount of oxygen. John George 4PJG ...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. Experiment to Investigate the Effect of Temperature on the Rate of Photosynthesis in Elodea.

    * What is the best way to measure results? The first preliminary experiment was done to investigate the effect of light intensity on the rate of photosynthesis. The aim of this experiment was to discover the distance the lamp needed to be from the elodea.

  2. This experiment involves using a photosynthometer to investigate how temperature affects the rate of ...

    Similarly if the distance is greater than 10 cm, then this decrease in light intensity shall contribute to a decrease in rate of photosynthesis and thence slowing down the rate at which the oxygen bubble(s) are released13. Therefore it is vital that this distance is kept constant throughout the experiment to ensure a fair test.

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

    This gave the varied results needed in order to find the water potential of the potato tuber cell. If any of the variables below or as explained before (method) were not kept constant, it would mean we would have an unfair test.

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

    Short wavelengths have high energies and long wavelengths have lower energies. Pigments How is light captured by living things? Molecules, when struck by a wave or photon of light, reflect some of its energy back out, or it can absorb the energy, and thus enter into a higher energy or excited state.

  1. The aim of this experiment is to investigate the factors affecting photosynthesis in Elodea.

    This means that as light intensity increases the rate of photosynthesis also increases. The light energy is the activation energy for the reaction. Without sufficient light energy photosynthesis would not occur. Temperature affects the rate of photosynthesis because the enzymes are only activated when they reach a certain temperature, and

  2. Investigating how the amount of oxygen given off by Pond weed changes when the ...

    Temperature affecting molecules Safe Test: I will make this a safe test by doing the following: * I will roll up the sleeves to my shirt to make sure that they don't get in the way of the experiment or knock any objects over causing hazard.

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