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Photosynthesis

Photosynthesis

All green plants need to be able to make their own food.They do this by a 
process called photosynthesis.For photosynthesis to occur they need sunlight 
energy.This energy is absorbed by a green pigment called chlorophyll,which 
is mainly found in the leaves.This energy then combinEs with water molecules 
(from the soil) and carbon dioxide (from the air).Then as a result of this,a 
type of sugar is produced .This is called glucose.Also oxygen is made.

For my experiment I have chosen to use light distance as my variable.This 
means that to carry out a fair test everything else must be kept the same 
during the experiment.

Hypothesis

I think that as the light source (desk lamp) is moved closer to the 
pondweed,the rate that oxygen is produced will increase therefore more 
oxygen willbe produced and also more glucose. I believe this will happen 
because when the the light source is nearer to the plant more of the plants 
surface area is coming in to contact with the light from the desklamp 
therefore more photosynthesis will occur which will  mean more oxygen and 
glucose will be produced.

Apparatus

· Funnel.
· Measuring cylinder.
· Stop watch.
· Card board and foil(used to fillter the light).
· Beaker.
· Desklamp.
· one metre ruler

light, experiment, distance, water, produced, oxygen, desklamp, same, must, dioxide, carbon, three, test, source, keep, fair, called, apparatus, value, therefore, set, safety, results, pondweed, plant, photosynthesis, out, one, occur, mixture, minutes, measuring, make, glucose, energy

Word Count: 411

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