Which of the following is the coldest rexampleion?

Options

A. Troposphere
B. Mesosphere
C. Stratosphere
D. thermosphere

Answer

To determine which of the following atmospheric layers is the coldest, we will analyze the temperature characteristics of each layer: troposphere, stratosphere, mesosphere, and thermosphere.

### Step-by-Step Solution:

1. **Identify the Layers of the Atmosphere**:
- The atmosphere is divided into several layers:
- Troposphere
- Stratosphere
- Mesosphere
- Thermosphere
- Exosphere (not relevant for this question)

2. **Analyze the Temperature of Each Layer**:
- **Troposphere**:
- Temperature ranges from about 62°F (warmest at the bottom) to -60°F (coldest at the top).
- **Stratosphere**:
- Temperature ranges from -60°F to 5°F. The presence of the ozone layer causes the temperature to increase with altitude.
- **Mesosphere**:
- Temperature ranges from 32°F to -130°F. This layer is known for having the coldest temperatures in the atmosphere.
- **Thermosphere**:
- Temperature ranges from 932°F to 3632°F. In this layer, temperatures increase significantly with altitude due to the absorption of solar radiation.

3. **Determine the Coldest Layer**:
- From the temperature ranges analyzed, the mesosphere has the lowest temperatures, reaching as low as -130°F (approximately 100 Kelvin).
- Therefore, the mesosphere is identified as the coldest layer of the atmosphere.

4. **Conclusion**:
- The coldest layer among the given options is the **mesosphere**.

### Final Answer:
The coldest layer of the atmosphere is the **mesosphere**.

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