Photosynthesis

• Photosynthesis is the process of plant making food in plants.

• Plants use carbon dioxide, water and sunlight to make glucose and oxygen.

• Photosynthesis is a chemical reaction .

• Carbon dioxide +Water = Glucose + Oxygen (in the presence of sunlight)

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Energy transfer

• Photosynthesis needs a supply of energy from the sunlight .

• During photosynthesis leaves absorb the energy of light.

• The energy is stored in glucose.

• Glucose store of chemical potential energy .

• Photosynthesis happens inside the chloroplasts in a palisade cell like the picture given below

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Storing carbohydrates

• Glucose = sugar =  carbohydrates .

• Plants make glucose than they need .

• They store some of it for later .

• But glucose is soluble in water , so they store change some to carbohydrates -starch.

• Thousands of glucose molecules link together to form a starch molecules .

• These molecules are too big to dissolve in water .

• Starch molecules will be stored in cells , a iodine test can prove it .