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This is called photosynthesis, which means "making through light".

In this experiment we were told that we would be measuring the rate of photosynthesis.

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They do this by a process called Photosynthesis.

The occurrence of photosynthesis is very important to us as humans, because it provides us with the oxygen we need to breathe and plants are at the bottom of every food-chain and so without them, I would collapse....

Photosynthesis need light to work, so light therefore should speed up the rate of photosynthesis.

Although this is slightly high for
the temperature in which a plant generally photosynthesises best, (20
degrees centigrade) it was the first temperature at which the
experiment worked successfully, and so we decided that it should be
kept constantly at this in order to conduct a fair test.

The aim was to show that light is necessary for photosynthesis.

Plants cells contain a number of structures that are involved in the process of photosynthesis:

Background information: Photosynthesis Photosynthesis is the process of autotrophs turning carbon dioxide and water into carbohydrates and oxygen, using light energy from sunlight.

There are four things that are required by the plant before it can carry out photosynthesis, they are light, chlorophyll, carbon dioxide and water ....

The way they do this is called photosynthesis.

Diagram of a plant cell involved in production of glucose from photosynthesis

(see page 1 Light in Photosynthesis)

However, this theory would not continue forever as long as the light
intensity was increased further & further.

When photosynthesis takes place, plants use the suns energy to combine carbon dioxide from the air with water from the soil to create glucose (a carbohydrate)....

Chloroplasts - containing chlorophyll and enzymes needed for reactions in photosynthesis.
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  • Organisms Depend Upon Photosynthesis 1.

    I am trying to find out if the distance of the pond-weed from a lamp will change the rate of photosynthesis.

  • Most food chains start with photosynthesizers.

    Nucleus - containing DNA carrying the genetic code for enzymes and other proteins used in photosynthesis

  • Photosynthesis is the procedure all plants go through to make food.

    Hypothesis: The rate of photosynthesis in the water plant hydrilla will change as the rate of carbon dioxide changes.

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Photosynthesis is the method that plants use to make their own food.

Variables: The variables that might affect the rate of photosynthesis in this experiment are: Temperature: When the temperature rises so does the rate of photosynthesis; this is because as the temperature around the plant rises the enzymes controlling photosynthesis inside the chloroplasts heat up and start moving around faster, the fast moving molecules collide with other fast moving enzymes causing them to react....

Photosynthesis consists of two connected sets of reactions....

This process is also affected by the temperature surrounding the plant (the species of plant we experimented with, pond weed, photosynthesised best at around 20 degrees centigrade.) Light, temperature & CO2 are known as limiting factors, and each is as important as the next in photosynthes...

It affects the growth of the plant as photosynthesis is reduced.

Furthermore, I predict that if the light intensity increases, the rate of photosynthesis will increase at a proportional rate and more oxygen will be produced and therefore the oxygen levels will increase.

This tutorial introduces photosynthesis

My reason for believing this
is that as mentioned previously, light is one of the limiting factors
required for photosynthesis, and by lowering the amount of light
available to the plant, I will be decreasing the rate at which the
process of photosynthesis takes place in the plant.

Chemical formula for photosynthesis

Similarly, by
providing the plant with a greater intensity of light, I will be
enabling the plants' process of photosynthesis to take place more
intensively, as the factor required (in this case light) is available
at a greater quantity.

Photosynthesis- Ideas for Teaching, Resources for …



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Explanations

Reason 1

When the green plant is provided with a higher concentration of CO2 in
the environment it is photosynthesising in, the rate of photosynthesis
conducted by the plant will be higher - the availability of one of the
limiting factors was higher.

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