BACKGROUND INFORMATION When light shines on pondweed, Elodea sp, bubbles of gas are released. The rate at which bubbles of gas are produced can be used to measure the rate of photosynthesis. An investigation was carried out to study the effect of different colours of light on the rate of photosynthesis in the pondweed. ● ● . pret, Drawing and The pondweed was exposed to one colour of light and left for 5 minutes before measurements were taken. The time taken for the release of 20 bubbles was recorded. The procedure was repeated using light of a different colour of equal intensity. The apparatus was set up as shown in the diagram below. Bubbles of gas Pondweed

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Photosynthesis

Plants have a capacity that we humans can only imagine— the ability to produce food from sunlight. Sure, we can prepare some dishes that we can savor on, but it become possible because of the plants (as they serve as a producers of all the raw materials required). Photosynthesis is the method of assembling carbohydrates with the aid of sunlight.