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

Does Changing the Light Intesity Affect the Rate of Photosynthesis?

Extracts from this document...

Introduction

DOES CHANGING THE LIGHT INTESITY AFFECT THE RATE OF PHOTOSYNTHESIS? Photosynthesis. This is the food process that occurs in plants. It makes Glucose and oxygen; this increases the mass of the plant making it bigger. The raw materials used to make the process are Carbon Dioxide (CO2) and water (H2O) but plain water will not do, as the plant needs minerals in the water to help it grow more. Light energy is possibly the most important element for this process to work light energy makes the plants green and is absorbed by a green substance called Chlorophyll. Word Equations. These are the word equations for this process. Prediction. I predict that the photosynthesis process will take place quicker when the lamp is closer to the jar than when it's farther away from it. ...read more.

Middle

Inside this will be a test tube filled with approximately 12% of Potassium Hydrogen Carbonate (to ensure that the weed has enough Carbon Dioxide) and the rest was filled up with water, which will be stuck to the bottom with plasticine. A lamp will be place next to it to and a ruler will be measuring the distance between the lamp and the beaker. I will also use a thermometer to keep it the same temperature. Fairness Factors. I will keep the test fair by: *Using the same volume of water throughout. *Keeping the water the same temperature. *Using the same wattage lamp all the time. Diagram. Method. To do this experiment properly you must follow these steps. ...read more.

Conclusion

I also recorded the results on the second they happened instead of waiting for a while because then the weed would have had time to stop photosynthesising and would have had to start up again before I could record the next setting. Conclusion. I put all my results into my graph which shows that what I predicted at the start of this was right, the average bubbles per minute was much higher at the start than at the end, there was a rapid drop at the start of the experiment which evened off at the end. I found out that the closer the lamp was to the weed the faster it would photosynthesise, I also found out that the following factors could also change the rate of the photosynthesis: A drop in the carbon dioxide, Or the light intensity could drop without me knowing leading to a loss of bubbles. ...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

    Factors That Affect the Rate of Photosynthesis

    3 star(s)

    *Note: Our distance did not include 0cm because the closest possible distance is 2.5mm. This is because the beaker is rounded so we are unable to get the exact distance of 0mm. Analysing Evidence & Drawing Conclusions--> Plan B Our results to both our preliminary and actual work can be shown on a line graph (see pages 3a and 6a).

  2. How does changing the temperature affect the rate of Photosynthesis?

    In order for my experiment to be more reliable, I will carry out three repeats for each temperature. From these factors, I decided upon changing the temperature. I did so due to the fact I thought it'd be an interesting - yet challenging experiment, and I'd never conducted an experiment with the variable as temperature before.

  1. How temperature affects the rate of photosynthesis.

    Group Class Average of Average rate of O2 released (mm3/min) 1 2 3 4 5 6 7 8 9 10 11 12 13 0 0.40 0.10 0.07 0.10 0.13 0.08 0.10 0.10 0.10 0.40 0.13 0.27 0.40 0.18 15 10.59 3.72 8.20 4.32 1.61 2.71 3.12 13.04 1.91 5.50 2.01

  2. Factors That Affect Photosynthesis.

    From both graphs there is a best-fit curved line. This means that the rate of photosynthesis increases at an exponential rate. However, my prediction that light intensity is inversely proportional to the distance squared did not fit into my results perfectly.

  1. Investigate the factors, which affect photosynthesis.

    If the photosynthesis story is sound, then the lack of any one of these three conditions should stop photosynthesis, and so stop the production of starch. In designing the experiments, it is very important to make sure that only one independent variable is altered.

  2. Which factors affect the rate of photosynthesis?

    The central part of the cell is a vacuole containing cell sap, which is mainly water. The cytoplasm is surrounded by a cell- surface membrane. Chlorophyll pigments absorb the light energy and convert it into food. This is why it is called photosynthesis.

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