photosynthesis 5.0 / 5 based on 1 rating ? SciencePhotosynthesisYears 7-9 (KS3)AQA Created by: Squashy7Created on: 06-06-21 11:31 Photosynthesis chem equation 6 CO 2 + 6 H 2 O → C 6 H 12 O 6 + 6 O 2 1 of 18 Photosynthesis word equation carbon dioxide + water -------> oxygen + glucose 2 of 18 how does light effect the rate of photosynthesis For most plants, the brighter the light, the faster the rate of photosynthesis. If there is little/no light, photosynthesis will stop, 3 of 18 how does temperature effect the rate of photosynthesis As temperature increases, the rate of photosynthesis increases. However if the temperature is too high (40-50◦C) then the enzymes controlling photosynthesis denature, slowing the rate. 4 of 18 How does co2 concentration effect the rate of photosynthesis Increasing the CO2 concentration, increases photosynthesis. The atmosphere is only 0.04% carbon dioxide, so it often limits the rate of photosynthesis. On a sunny day, carbon dioxide is the most common limiting factor. 5 of 18 *** does chlorophyll levels effect the rate of photosynthesis Less chlorophyll results in less photosynthesis. Minerals e.g. magnesium are used to make chlorophyll, so can affect the rate of photosynthesis. 6 of 18 Chloroplasts are An organelle inside the cell- where photosynthesis takes place. 7 of 18 Chlorophyll are The green substance inside chloroplasts which absorbs light. 8 of 18 Glucose is A water-soluble sugar, which contains six carbons, used in respiration and can be made by photosynthesis. 9 of 18 Endothermic Reaction Photosynthesis requires an input of energy from the environment. 10 of 18 How is Leaf surface a leaf adaptation The leaf itself is broad and thin, to give a large surface area for light to fall on and short diffusion distances for gases. 11 of 18 how is 7 Veins a leaf adaptation Carry water from xylem in the plant, to the cells of the leaves and remove products of photosynthesis in the phloem. 12 of 18 how is 8 Air Spaces a leaf adaptation Allow carbon dioxide to get into the cells and oxygen to leave the cells, by diffusion. 13 of 18 how is 9 Guard Cells a leaf adaptation These cells open and close the stomata (holes in the leaf), to regulate gas exchange. 14 of 18 Cellulose A storage molecule made of glucose, strengthens cell walls. 15 of 18 Starch An insoluble molecule used for energy storage in plants. the test is Iodine- boil leaves in ethanol, look for blue-black colour. 16 of 18 Nitrates Plants combine nitrates with glucose & other minerals to make amino acids. the test is Biuret Test for Proteins- purple colour change. 17 of 18 Lipids Glucose is used to build up fats & oils, which are used as an energy store, often in seeds. 18 of 18
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