If 10,000 J of energy is present at the `T 1` level, then what is the energy available at the `T_2` level ?

Options

A. 1000 J
B. 10 J
C. 100 J
D. 1 J

Answer

To solve the problem of determining the energy available at the T2 level (trophic level 2) given that there are 10,000 J of energy at T1 (trophic level 1), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the 10% Law of Energy Transfer**:
The 10% law states that only about 10% of the energy from one trophic level is transferred to the next trophic level. This means that when energy moves from producers to primary consumers, only a fraction of that energy is passed on.

2. **Identify the Energy at T1**:
We are given that the energy at T1 (trophic level 1) is 10,000 J. This energy is primarily available to the producers (like plants).

3. **Calculate the Energy at T2**:
To find the energy available at T2 (trophic level 2), we apply the 10% rule:
\[ \text{Energy at T2} = \text{Energy at T1} \times 10\% \]
\[ \text{Energy at T2} = 10,000 \, \text{J} \times 0.10 = 1,000 \, \text{J} \]

4. **Conclusion**:
The energy available at T2 (trophic level 2) is 1,000 J.

### Final Answer:
The energy available at the T2 level is **1,000 Joules**.

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