5. What Happens at Noon
At noon, the sunlight is very strong. So:
- Photosynthesis increases rapidly
- The plant needs more carbon dioxide than it gets from respiration.
- So it starts taking in extra carbon dioxide from the air.
6. Net Release of Oxygen
- The plant produces more oxygen through photosynthesis than it needs for respiration.
- This extra oxygen is released into the air.
That’s why plants help in purifying the air – they take in COâ‚‚ and release Oâ‚‚, especially during daylight.
Role of Light in Photosynthesis
Importance of Light
Light is essential for photosynthesis. It gives the energy required to:
- Break down water molecules
- Power the reactions that build sugars from carbon dioxide
This energy is absorbed mainly by chlorophyll, the green pigment in leaves.
- The light energy is converted into chemical energy.
- This energy is then stored in the bonds between carbon and hydrogen (C-H bonds) in glucose molecules.
In Simple Terms:
Sunlight charges the plant’s internal battery – this battery is the sugar (glucose) made during photosynthesis.