1. Capturing Sunlight: Plants contain a pigment called chlorophyll, which absorbs light energy from the sun, primarily in the red and blue wavelengths.
2. Using Water and Carbon Dioxide: Plants take in water from the soil through their roots and carbon dioxide from the air through tiny openings called stomata on their leaves.
3. Converting Energy: Chlorophyll uses the captured sunlight energy to convert water and carbon dioxide into glucose (a simple sugar) and oxygen. This chemical reaction is represented as:
6CO₂ + 6H₂O + sunlight → C₆H₁₂O₆ + 6O₂
4. Building Biomass: The glucose produced in photosynthesis is a source of energy and the building block for plant growth. Plants use glucose to create:
* Structural components: Cellulose, lignin, and other complex carbohydrates form the plant's cell walls, giving it its structure and rigidity.
* Storage compounds: Starches and sugars store energy for later use.
* Other molecules: Proteins, lipids, and nucleic acids are essential for various cellular functions.
5. Releasing Oxygen: The byproduct of photosynthesis is oxygen, which is released into the atmosphere.
In summary: Plants convert sunlight energy into chemical energy in the form of glucose. This glucose is then used to create biomass, which includes the plant's physical structure, storage compounds, and other essential molecules. This process is fundamental to life on Earth, as it provides the food and oxygen necessary for all living organisms.
