photosynthesis

• Photosynthesis is a process where carbon dioxide combines with water in the presence of light absorbed by the chlorophyll to make sugar and produce oxygen.
• Plants trap light to make sugar, the excess of which is converted to starch, which turns iodine solution to yellowish brown to dark blue.
• chloroplast contains chlorophyll
• as light intensity increases, the rate of photosynthesis increases.
• when plants respire, they also give out carbon dioxide.
• plants require leaves to photosynthesise and make food.
• bigger surface area of leaves contain more chlorophyll, and so they can trap more light and make more sugar.
• the part of the leaves that enables the plant to exchange gases with its surrounding is its stomata
• At noon, the light intensity is the highest, causing the rate of photosynthesis to be the highest, taking in the greatest amount of carbon dioxide.