A storm is predicted if atmosphere pressure

Options

A. Rises suddenly
B. Rises gradually
C. Falls suddenly
D. Falls gradually

Answer

**Step-by-Step Solution:**

1. **Understanding Atmospheric Pressure**: Atmospheric pressure is the weight of the air above us. It changes due to various weather conditions.

2. **Cold Air Meets Warm Air**: When cold air meets warm air, the warm air, being lighter, rises above the cold air. This process is crucial in weather formation.

3. **Effect on Surface Pressure**: As the warm air rises, it creates a space that needs to be filled. This results in a drop in surface atmospheric pressure.

4. **Formation of Low-Pressure System**: The drop in atmospheric pressure leads to the formation of a low-pressure system. This is often associated with stormy weather.

5. **Wind Movement**: The difference in pressure causes winds to blow from high-pressure areas to low-pressure areas, which can lead to storm conditions.

6. **Conclusion**: Therefore, a storm is predicted when atmospheric pressure falls suddenly due to the interaction of cold and warm air.

7. **Identifying the Correct Option**: From the options provided:
- Rise suddenly (wrong)
- Rise gradually (wrong)
- Fall suddenly (correct)
- Fall gradually (wrong)

The correct answer is that atmospheric pressure falls suddenly.

**Final Answer**: A storm is predicted if atmospheric pressure falls suddenly.

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