Question

Write an activity to show that sunlight is needed for photosynthesis.

Answer 1

Hi,
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Here is your answer,
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Materials Required :-
A potted plant, Aluminium foil, Ethyl alcohol, Iodine solution.

Procedure :-
Take a potted plant and cover a part of one of its leaves with Aluminium foil. Place that in sunlight pluck the leave after a few days and remove the Aluminium foil from it. Take about 20 ml of ethyl alcohol in a boiling tube and dip the leaf in it. Place the boiling tube in a hot water bath. After some time, when the alcohol turns green, remove the leaf from the boiling tube. Wash the leaf with warm water. Place a few drops of iodine solution on the leaf.

Observation :-
We observes that portion of leaf exposed to sunlight turns blue or blue black.

Conclusion :-
1. Leaves make starch as food by photosynthesis.
2. Sunlight is necessary for photosynthesis .

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HOPE YOU WILL UNDERSTAND MY WORDS, a request is here please as I am an ACE ranker I wish that to make my way easy for the GENIUS rank you should mark my answer brainlest if you wish then only ☺.
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