In the formation of sea breeze, wind blows from?

Analysis

This question tests your understanding of convection currents and the specific heat capacity of land versus water. It is a classic topic in Physics under the study of Heat Transfer.

Concept Explanation

To understand sea breezes, you must remember two key principles:

1. Specific Heat Capacity: Land has a lower specific heat capacity than water. This means land heats up and cools down much faster than the sea.
2. Convection: Warm air is less dense and rises, creating a low-pressure area. Cooler, denser air moves in to replace the rising warm air.

During the day:

• The sun heats both the land and the sea.
• Because land has a lower specific heat capacity, it gets hot much faster than the sea.
• The air above the land becomes hot, expands, and rises (creating a low-pressure zone over the land).
• The air over the sea remains relatively cooler and denser.
• Nature seeks to balance this pressure difference, so the cooler air from the sea rushes in toward the land to replace the rising warm air. This movement of air is what we call a sea breeze.

Step-by-Step Solution

1. Identify the heat source: Solar radiation heats the land surface more rapidly than the water surface during the day.
2. Determine air movement: The air over the land warms up and rises, creating a partial vacuum (low pressure) over the land.
3. Establish the flow: High-pressure air over the cooler sea moves toward the low-pressure area over the warmer land.
4. Conclusion: The wind direction is from the sea toward the land.

Exam Tip

Think of the name: A "Sea Breeze" is a breeze that comes from the sea. Conversely, a "Land Breeze" occurs at night when the land cools down faster than the sea, causing the wind to blow from the land to the sea.

The correct option is D.