Page 224 - Demo

water and mineralssunlightcarbon dioxideoxygenCarbon dioxide + Water + Minerals Sugar + Oxygen SunlightChlorophyllLet%u2019s now understand how photosynthesis takes place.PHOTOSYNTHESISThe process by which plants make food in their green leaves with the help of water, air, minerals in the presence of sunlight is called photosynthesis. The food made by plants is called sugar.Green leaves contain chlorophyll. Only green leaves can prepare food.Did you know?Photosynthesis is to make food in the presence of sunlight.Did you know?%u2022 Take 2 potted plants.%u2022 Keep one potted plant in the sunlight for a day.%u2022 Keep the other potted plant in a dark place for a day.%u2022 Take a leaf from each of the plants and boil them in water separately.%u2022 Then boil them in spirit.%u2022 Wash the leaves in cold water and put them in separate dishes.%u2022 Add a few drops of iodine to the leaves.%u2022 The leaf from the plant kept in sunlight turns bluish-black.%u2022 The leaf from the plant kept in a dark place does not show any change.%u2022 What do you understand from this activity?Here%u2019s an activity to show that sunlight is needed for photosynthesis. photosynthesis in a leafArrow-Puffin-4_Semester-1 Science 223