To determine the correct word equation for photosynthesis, we must recall the fundamental process of how plants convert light energy into chemical energy. Photosynthesis primarily involves the transformation of carbon dioxide and water into glucose and oxygen.
Here is a detailed step-by-step explanation:
1. Identify the reactants and products involved in photosynthesis:
- Reactants: Carbon dioxide (CO₂) and water (H₂O)
- Products: Glucose (C₆H₁₂O₆) and oxygen (O₂)
2. Write down the general form of the photosynthesis word equation:
- "Carbon dioxide + water → glucose + oxygen"
Now let's compare this with the options provided:
- Option 1: Carbon + hydrogen + oxygen → glucose + water
- This is incorrect because it involves carbon and hydrogen which are not the primary reactants in photosynthesis.
- Option 2: Glucose + water → carbon dioxide + oxygen
- This is incorrect because it depicts a reverse reaction and not photosynthesis.
- Option 3: Carbon dioxide + water → glucose + oxygen
- This is correct because it accurately represents the process of photosynthesis.
- Option 4: Glucose + oxygen → carbon + water + oxygen
- This is incorrect because it describes a different reaction, not photosynthesis.
Hence, the correct word equation for photosynthesis is:
Carbon dioxide + water → glucose + oxygen
Therefore, the correct answer is the third option: carbon dioxide + water → glucose + oxygen.
