If 1,000,000 J of sunlight is provided to a food chain what is the amount of energy is present a top consumer level is food chain have four trophic level.

Answer

To solve the problem of how much energy is present at the top consumer level in a food chain with four trophic levels when 1,000,000 J of sunlight is provided, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Initial Energy Input**:
- The total amount of sunlight energy provided is 1,000,000 J.

2. **Calculate Energy Available to Producers (First Trophic Level)**:
- Only 1% of the sunlight energy is available for photosynthesis by plants (producers).
- Calculation:
\[ \text{Energy available to producers} = 1\% \text{ of } 1,000,000 \text{ J} = \frac{1}{100} \times 1,000,000 = 10,000 \text{ J} \]

3. **Calculate Energy Available to Primary Consumers (Second Trophic Level)**:
- According to the 10% law, only 10% of the energy from the producers is available to the primary consumers.
- Calculation:
\[ \text{Energy available to primary consumers} = 10\% \text{ of } 10,000 \text{ J} = \frac{10}{100} \times 10,000 = 1,000 \text{ J} \]

4. **Calculate Energy Available to Secondary Consumers (Third Trophic Level)**:
- Again, applying the 10% law, only 10% of the energy from the primary consumers is available to the secondary consumers.
- Calculation:
\[ \text{Energy available to secondary consumers} = 10\% \text{ of } 1,000 \text{ J} = \frac{10}{100} \times 1,000 = 100 \text{ J} \]

5. **Calculate Energy Available to Top Consumers (Fourth Trophic Level)**:
- Finally, applying the 10% law once more, only 10% of the energy from the secondary consumers is available to the top consumers.
- Calculation:
\[ \text{Energy available to top consumers} = 10\% \text{ of } 100 \text{ J} = \frac{10}{100} \times 100 = 10 \text{ J} \]

### Final Answer:
The amount of energy present at the top consumer level (fourth trophic level) is **10 J**.

---