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

How does the amount of Light affect the amount of oxygen bubbles produced in sodium carbonate solution?

Extracts from this document...

Introduction

How does the amount of Light affect the amount of oxygen bubbles produced in sodium carbonate solution? Aim In this investigation is to see is to see if when there is more light shining onto some pondweed in sodium carbonate solution it affects the amount of bubbles produced from the pondweed. Background information Photosynthesis is a chemical reaction occurring in the leaves of green plants. Using the energy from sunlight, it changes carbon dioxide and water into glucose and oxygen. Certain things will limit photosynthesis from photosynthesising quickly. One of these things is light. A plant can have lots of carbon dioxide and water but if it doesn't have enough light it won't work. Equation for Photosynthesis Carbon Dioxide + Water + Light Energy ==> Glucose + Oxygen Balanced Equation for Photosynthesis 6CO2+ 6H20 + Light energy ==> (chlorophyll) ...read more.

Middle

3) Turn the light on for one minute and count the amount of bubbles that are given off from pondweed. Repeat this three times using the same light, same distance, same position and same pondweed. Record all the results and work out the average. This gives a correct view of the results and so I can see if the is a wrong result. 4) Repeat step three at the distance on 10cm, 20cm, 30cm and 40cm making sure that the position, pondweed and light all stay exactly the same. The variables are the amount of light intensity, the amount of carbon dioxide and the amount of water. Diagram Table of Results Distance (cm) number of bubbles of oxygen (per minute) 1 2 3 Average 50 5 5 5 5 40 7 5 7 6.33 30 8 8 7 7.66 20 0 11 10 10 10 13 14 15 ...read more.

Conclusion

These anomalous results could have happened because we may have missed some oxygen bubbles. There is one way in which we could have done our experiment differently. We didn't use a heat shield and the results we got could have been affected by the heat changing. I think my method was suitable I think it proved my hypothesis well. I think to make my results more accurate I could have made sure the light was in the same position each time because it changed slightly each time we moved it. Also I could have moved the light right away from the pondweed e.g. 100cm away from eh pondweed to see if the pattern carries on. Also to get more varied results I could have tried a different amount of time in which to count the bubbles e.g. 2 minutes. But over all I think I got pretty accurate results, which still showed the pattern that happens when, photosynthesis occurs. ...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

    An experiment to measure the amount of oxygen bubbles given off in different strengths ...

    3 star(s)

    I will take ten readings one every 30 seconds this will take me up to 5 minutes. After this I will do the same for 0.5%, 0.75% and 1.0% of NaHCO3 during all these experiments I will be using the same piece of pond weed.

  2. Investigation on How the Amount of Light Affects Photosynthesis.

    As I am going to investigate on how the amount of light affects photosynthesis I am going to use a lamp and move it away from a beaker. To do this I am going to use a plant called Elodea (a Canadian pondweed)

  1. Investigating how the amount of Hydrogen Peroxide will affect the speed in which the ...

    the catalyst that decides the speed in which the oxygen would separate from the water in hydrogen peroxide (H2O2). I'm going to make it a fair test by keeping the same amount of catalyst by using a cork borer. I'm going to keep it at the same temperature (room temperature)

  2. Test the prediction that the closer the lamp is to a piece of pondweed ...

    Variables- Input variables - light intensity is to be varied by increasing and decreasing the distance from the light source to the plant Output variables - volume of oxygen produced (rate of photosynthesis) is to be measured by finding the volume of oxygen produced in a minute, and thus finding the rate of photosynthesis Control variables -Light wavelength (colour)

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

    We will do the test 5 times this includes a control. Each test will be done 3 times to make sure that we don't get any random or mistaken results. The Sodium Bicarbonate will be in liquid so we will have 5 ml of Sodium Bicarbonate in the water of the plant to speed things up.

  2. The intent for this investigation is to discover the amount of oxygen bubbles that ...

    * The length of the pondweed * The type of the pond weed * The carbon dioxide concentration * The type of water * The temperature * The light intensity * The light wavelengths * Time from cutting the pondweed to recording the results As my variable, I have chosen to modify the light intensity.

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