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 energy provided from sunlight is 1,000,000 J.

2. **Calculate Energy Available to Producers**: According to ecological principles, only about 1% of the sunlight energy is converted into chemical energy by producers (plants).
- Calculation:
\[ \text{Energy available to producers} = \frac{1}{100} \times 1,000,000 \text{ J} = 10,000 \text{ J} \]

3. **Apply the 10% Rule for Energy Transfer**: The 10% rule states that only about 10% of the energy from one trophic level is transferred to the next level. We will apply this rule to find the energy available at each trophic level.

- **Primary Consumers (1st Trophic Level)**:
- Calculation:
\[ \text{Energy at primary consumers} = 10\% \times 10,000 \text{ J} = 1,000 \text{ J} \]

- **Secondary Consumers (2nd Trophic Level)**:
- Calculation:
\[ \text{Energy at secondary consumers} = 10\% \times 1,000 \text{ J} = 100 \text{ J} \]

- **Tertiary Consumers (3rd Trophic Level)**:
- Calculation:
\[ \text{Energy at tertiary consumers} = 10\% \times 100 \text{ J} = 10 \text{ J} \]

4. **Determine Energy at the Top Consumer Level (4th Trophic Level)**: Since the question specifies a food chain with four trophic levels, the energy at the top consumer (tertiary consumers) is:
- Final Answer:
\[ \text{Energy at top consumer level} = 10 \text{ J} \]

### Final Answer:
The amount of energy present at the top consumer level in a food chain with four trophic levels is **10 J**.

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