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Answer:
1) Photosynthesis is the process through which plants convert light energy into chemical energy. Here is the chemical reaction involved: water and carbon dioxide combine to form glucose and oxygen. Since new chemical species are formed, photosynthesis is clearly a chemical change.Here all the producys formed are different from the reactants
2) We know that for rusting, the presence of both oxygen and water (water vapour) is essential. Thus, in coastal areas, the air contains high moisture which means more humid environment and rusting becomes faster. Whereas in deserts, moisture in air is less, hence rusting of iron is very slow there.
Answer:
1. Photosynthesis is the process through which plants convert light energy into chemical energy. Here is the chemical reaction involved: water and carbon dioxide combine to form glucose and oxygen. Since new chemical species are formed, photosynthesis is clearly a chemical change.
Photosynthesis requires energy to drive the chemical reaction. Photosynthesis is an endothermic reaction. This means it cannot occur without energy (from the Sun). The light required is absorbed by a green pigment called chlorophyll in the leaves.Photosynthesis is an example of a chemical reaction because it is a process in which carbon dioxide and water are combined to form glucose and oxygen. It is an endothermic reaction because it requires solar energy.
2. The important components for rusting are iron, oxygen, and moisture. In coastal areas, the content of moisture in the air is high, so the process of rusting is faster.