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What is Photosynthesis - moistened(when necessary only with...

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What is Photosynthesis? All organisms require energy for their chemical reactions. These reactions may be involved with reproduction, growth, or other activities. Photosynthetic organisms such as plants use light energy to produce carbohydrate (glucose). Glucose can be used at a later time to supply the energy needs of the cell. Photosynthesis is therefore a process in which the energy in sunlight is stored in the bonds of glucose for later use. Equation for Photosynthesis This experiment was published by Jan Baptisa van Helmont in 1648: "...I took an earthenware vessel, placed in it 200 pounds of soil dried in an oven, soaked this with rainwater, and planted in it a willow branch weighing 5 pounds. At the end of five years, the tree grown from it weighed 169 pounds and about 3 ounces. Now, the earthenware vessel was always
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Unformatted text preview: moistened (when necessary) only with rainwater or distilled water, and it was large enough and embedded in the ground, and, lest dust flying be mixed with the soil, an iron plate coated with tin and pierced by many holes covered the rim of the vessel. I did not compute the weight of the fallen leaves of the four autumns. Finally, I dried the soil in the vessel again, and the same 200 pounds were found, less about 2 ounces. Therefore 169 pounds of wood, bark, and root had arisen from water only." Most of the weight of the tree described in the above experiment came from carbon dioxide and water. The equation for photosynthesis shows that these compounds are used to produce glucose. 6CO 2 + 6H 2 O + Energy → C 6 H 12 O 6 + 6O 2 Equation for Cellular Respiration C 6 H 12 O 6 + 6O 2 → 6CO 2 + 6H 2 O + Energy...
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