Photosynthesis
Define Photosynthesis:-
Photosynthesis is how green plants make their own food (sugar) using sunlight, water, and air (carbon dioxide), releasing oxygen for us to breathe. Making food for the plant and keeping the air fresh.
Plants make their food using sunlight, water, carbon dioxide and nutrients and minerals from the soil. This process is called photosynthesis.
Chlorophyll, a green color pigment, present in leaves helps plant in absorbing energy of light.
Plants leaves have small pores called as stomata. Each stoma is guarded by 2 sausage-shaped cells called as guard cells. Guard cells help in opening and closing of stoma.
Plant exchange gases through stomata. Stomata are found on the underside of leaves.
The process of photosynthesis occurs in leaves. Thus leaves are called kitchen of plants or food factory of plants.
Glucose, starch or food produced by photosynthesis is stored within the plant.
Oxygen is a by-product of photosynthesis.
Plant are green because their cell contains chloroplast which has green coloured pigment known as chlorophyll. Chlorophyll helps plant in absorbing energy of sunlight.
Plants food ingredients are:-
1) Sunlight: Energy from the sun.
Water: Absorbed by roots from the soil.
2) Carbon Dioxide (CO2): Gas from the air, taken in by tiny holes (stomata) in leaves.
3) Chlorophyll: The green stuff in leaves that catches sunlight
Why photosynthesis became important:
Plants make their own food, so they don't need to eat other plants.
They make the oxygen that animals and people need to breathe.
It's the start of the food chain (animals eat plants, we eat animals/plants)
