The effect of light intensity on the rate of photosynthesis.

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Owen Davies GCSE Coursework

The effect of light intensity on the rate of photosynthesis.

Plan:

Aim: To investigate the affect of light intensity on the rate of photosynthesis.

Theory: Before I predict what will happen I must look at how photosynthesis occurs. Photosynthesis is the way plants create a source of food for themselves. Photosynthesis requires the following resources; Carbon Dioxide, Water and light.

Inside the leaves of a plant there is a green substance, this substance is known as chlorophyll. Chlorophyll is in the Chloroplast which are cells contained inside a plant. Chlorophyll absorbs sunlight and then makes the energy from the sunlight available for chemical reactions. This shows that Chlorophyll is used to convert light energy to chemical energy.         The plant can absorb carbon dioxide from the air. It can also uptake water from the soil. A plant also requires nitrogen and sulphur to create proteins; these can be acquired from nitrates and sulphates which are minerals in the soil.

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The equation for photosynthesis is:

        How photosynthesis works. The process mainly takes place inside the cells of plants, mainly in the leaves. Firstly the plant needs water; this is absorbed from the soil, through the roots and is carried up the stem by water vessels within the veins. Next the plant needs carbon dioxide, this absorbed from the through pores in the leaf known as stomata. Inside cells in the leaves the carbon dioxide is mixed with water to make sugar, but in order for these to be able to mix a ...

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