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

Rate of photosynthesis: and how it varies......

Extracts from this document...


Arefin Khan Rate of photosynthesis: and how it varies...... There are several things which need to be taken into account which can cause the rate of photosynthesis to change. A) sunlight concentration B) temperature C) chlorophyll concentration D) carbon dioxide availability Effects of the variables and there concentrations: The amount of sunlight will decide the rate of photosynthesis as there will be a an increased rate of photosynthesis due to the increased availability of photons of light. This light energy can then be transferred to chemical potential energy. The energy is then distributed around the plant and used for various reasons around it. The plant contains a lot of cellulose and it is needed in the plant cell walls and in the membranes. The osmotic pressure is kept up due to this rigid structure of the plants and so, it is very useful as a substance to make sure that everything is working smoothly within the plant. ...read more.


Due to this, there are a lot of things which need to be done to make sure that the temperature remains constant. Due to this, there is a major advantage when manipulating the variable, and so, a control can be manipulated and made to work as made. As a result the rate of photosynthesis is calculated. the rate of photosynthesis decreases with decreasing light intensities, and so the more light there is, the greater the rate of photosynthesis. With a reduction is the amount water that is being supplied to the plant, there is also a reduction in the rate of photosynthesis too. This is very hard to control and examine, as the process is within the plant and very complicated processes have to be radioactive water has t be used in order for the fact to be determined that water is actually used in the reaction. The radioactive water is used as a tracer, and so, thus, the water can be seen to be used in the process of photosynthesis. ...read more.


Method: there wil be a control for each variable, and possibly two of the variables will be investigated.the investigation will be carried out in the normal lab conditions. The source of light will be the sun, and the plants will be left on a window sill, so that they recive normal sunlight. The amount of sulight recived by the plant will be equal on all sides as there will be light shinig upon it from all sides. This will make it a fair test and so, there will be less discrepancy in the results obtained. Hence, a truer result can be obtained. Arefin Khan Methodology: Get plant Identify leaf which is to be used as subject Get back tape Put tape on surface of leaf and apply firmly, so as to ensure that no light passes through or is able to reach the leaf Make sure the the leaf is in plenty of sunlight for about 5 to 6 hours. As a result, enough time will be a destarchin gof the area were there is no sunlight Diane broke ...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. How temperature affects the rate of photosynthesis.

    increase in temperature has a greater affect on rate of photosynthesis between 45 oC and 55 oC compared to the smaller affect it produces between temperatures within 55 oC and 65 oC. For the graph showing the average rate of bubbles produced for the whole class, the shape too is of a curved bell.

  2. Metabolic Processes - Photosynthesis.

    transpiration d. photorespiration b. translocation e. photosynthesis c. photophosphorylation Imagine you have five small glass jars that are sealed to the atmosphere. All the jars are filled with a bicarbonate solution (as a source of carbon dioxide) and an indicator.

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