Describe an experiment to show that “sunlight is essential for photosynthesis”. ???
Answers
Answer:
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Explanation:
Experiment to prove that “sunlight is essential for photosynthes” is explained below:
(i) Select two healthy plants.
(ii) Keep them in a dark room for 3 days.
(iii) Now place them in different air tight chambers, one supplied with potassium hydroxide, which is used to absorb carbon dioxide.
(iv) Now keep the plants in sunlight for 2 hours.
(v) Pluck leaf from both plants and check the presence of starch.
(vi) Higher starch content in the jar with potassium hydroxide indicates that in the presence of light the photosynthesis have occurred so higher starch content is found.
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Explanation:
Sunlight is essential for photosynthesis
« place two identical plants in the same place under the sun.
« label the plants A and B .
« provide both plants with enough air and water
cover plant B with a black box.
« leave the plants in the same place for a few days.
Observation
« Plant A survived but not plant B.
Conclusion«
Plant A received enough air,water and sunlight to make food.Plant B has air and water but no sunlight.Hence,it was unable to make its own food.This shows that plants need sunlight to make food and stay alive besides having sufficient amount of air and water.
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