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

How Does The Light Intensity Effect The Rate Of Photosynthesis

Extracts from this document...

Introduction

How Does The Light Intensity Effect The Rate Of Photosynthesis Aim My aim is to discover how the light intensity on a plant can affect the rate of the photosynthesis reaction. : A piece of pond weed will be cut and placed into a beaker containing water and sodium bicarbonate. A lamp will be shined on to the pond weed and the amount of bubbles released from the plant will be counted. The lamp will be adjusted to different distances from the plant to try and obtain different results Prediction (Hypothesis) I predict that the greater the light intensity the greater the rate of photosynthesis will be. The more Sodium bicarbonate inserted into the water solution the greater the photosynthesis reaction will be. Scientific knoledge The sun floods the earth with light plants cells use light to help them make food by photosynthesis. ...read more.

Middle

Light energy travels along the circumference of an expanding circle. When light energy is released from a point, the energy is dispersed equally along the circumference. But since the circle is expanding, the circumference increases and the same light energy is distributed along a greater surface. Photosynthesis occurs only in the presence of light, and takes place in the chloroplasts of green plant cells. Photosynthesis can be defined as the production of simple sugars from carbon dioxide and water causing the release of sugar and oxygen. The chemical equation for photosynthesis can be expressed as: (light) 6CO2 + 6H2O ( C6H12O6 + 6O2 (in the presence of chlorophyll) The fact that all plants need light in order to photosynthesise has been proven many times in experiments, and so it is possible to say that without light, the plant would die. ...read more.

Conclusion

The range of this factor is 100cms to 5cms and I will repeat the experiment 3 times. To make it a fair test I am going to try and use the same eqipment and and weed, try to keep the temprature the same The apperatus I am going to use are 1 Retort Stand and Clamp 1 Bench Lamp with a 60 Watt bulb 1 Thermomiter 1 Stop Watch 1 Ruler 1 Testube 1 Piece of pond weed Method He apperatus I used is set up below :- First I will set up the eqipment shown above then cut the stem of the Pond Weed under water and put it in the solution then put it in the water+sodium bicarbonate solution then put the bench lamp 100cms away from the weed and started the stop watch and counted the bubbles coming from the stem of the weed over a peroid of 5 minites then repeat the experiment at distances of 60cms, 30cms, 15cms and 5cms. Also recording the water temprature on the thermomiter. Results ...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. The effect of light intensity on the rate of photosynthesis

    Throughout photosynthesis waste oxygen is given off as a gas, because it is in a high concentration in the cells, it diffuses to the outside of the leaf, where it is in a lower concentration, via the air spaces and open stomata.

  2. Investigate the effect of light intensity on the rate of photosynthesis in an aquatic ...

    show that photosynthesis is taking place, I chose to measure the rate of oxygen produced. Diagram a: Figure a: List of equipment required, and required measurements * Large beaker, or alternatively a 2 litre bottle cut in half: Fill with water at 30 degrees centigrade to 1 litre * One

  1. How temperature affects the rate of photosynthesis.

    and 55oC (13.95mm3/min). Therefore the null hypothesis stating that there is no significant difference between the two means has to be accepted and unlike the previous two t test values which did disagree with the null hypothesis. It can be concluded that these temperatures did not affect the rate of

  2. Boscastle Floods; A Natural Disaster?

    to an insurance payout although many of the cars will only have 3rd party insurance which will not cover the car and insurance companies are notoriously ruthless in finding ways not to pay people's claims. Even when people have managed to re-build their homes they will then have to pay

  1. Science Coursework

    * I will allow the Elodea to start producing oxygen as a result from photosynthesising due to light intensity (provided by my lamp) before I start my experiment. Equipment List * Large Beaker (Water Bath) * Clamp Stand * Boiling Tube * Na+ HCO3- solution * Elodea- Canadian pond weed

  2. Absorption Spectrum of Chlorophyll.

    Chlorophyll a and chlorophyll b each have three isomers with magnesium bonded to three different pairs of pyrrole nitrogen atoms. These isomers exist as tautomers rather than as resonant hybrids (Goodwin, 1965). Also, the original chlorophyll sample may undergo oxidation and produce oxidized products.

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