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Chemical Changes Produced by the Sun Science Project Idea
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Written by Dee
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Monday, 13 August 2007 |
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Science project idea on chemical changes produced by the sun’s energy.
Chemical Changes Produced by the Sun Science Project Idea
 Other chemical changes produced by the sun's energy. The power of the sun's rays to produce what we call chemical changes, illustrated in the making of starch in plants and in the making of pictures, is also shown by some rather common phenomena,  Fading of colors
(1) What is the appearance of portions of wall paper which have been covered by pictures as compared with the remaining part of the wall? (2) What is the appearance of your straw hat after it has been worn in the sunlight for several weeks? (3) Give other examples of changes of this kind which you have noticed.
Action upon living animals and plants (1) What is the effect of the sun upon the skin? Will light of a gas or electric lamp, or heat of a stove or furnace, produce the same changes? (2) What is the effect of  exposing to the sunlight parts of a plant that have been kept in darkness, as a potato or a stalk of bleached celery? (3) What is the effect of sunlight upon bacteria? This is the result of a chemical change in the living matter.
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