Explanation
Plants absorb carbon dioxide (CO₂) from the atmosphere.
This gas is essential for the process of photosynthesis.
Without carbon dioxide, plants cannot prepare their food or release oxygen.
Why Plants Absorb Carbon Dioxide
- Plants take in carbon dioxide mainly through small openings on their leaves called stomata.
- During photosynthesis, they use carbon dioxide along with water to make glucose (their food).
- Sunlight provides the energy needed for photosynthesis.
- The carbon from CO₂ helps plants build stems, leaves, and roots.
Role of Carbon Dioxide in Photosynthesis
Photosynthesis is the process by which plants make their own food.
Carbon dioxide + Water → (Sunlight) → Glucose + Oxygen
This shows that plants use carbon dioxide and release oxygen as a by-product.
The oxygen released by plants is essential for humans and animals to breathe.
How Plants Take In Carbon Dioxide
- Tiny pores (stomata) on leaves open and close to exchange gases.
- When stomata open, carbon dioxide enters the leaf.
- Inside the leaf, chloroplasts use this CO₂ to make food.
- Plants absorb only the CO₂ they need for photosynthesis.
Importance of Carbon Dioxide for the Environment
- Plants help maintain the balance of gases in the atmosphere.
- By absorbing CO₂, they help reduce its excess amount in the air.
- This helps control global warming to some extent.
- Forests and plants act as natural “carbon sinks” by storing carbon.
Key Points
- Gas absorbed by plants: Carbon dioxide
- CO₂ is needed for photosynthesis
- Plants take in CO₂ through stomata
- Helps plants make food and release oxygen
- Important for environmental balance