Heat Transfer in Nature - Land and Sea Breeze

Grade 7CBSE

Review the key concepts, formulae, and examples before starting your quiz.

🔑Concepts

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Heat transfer in fluids (liquids and gases) primarily occurs through the process of Convection .

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The land heats up and cools down much faster than the sea. This differential heating is the primary cause of coastal winds.

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T_{land}

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T_{land} < T_{sea}

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Air always moves from a region of High Pressure (cooler air) to a region of Low Pressure (warmer air).

📐Formulae

\text{Density } (\rho) \propto \frac{1}{\text{Temperature } (T)}

\text{Wind Direction: High Pressure } \rightarrow \text{Low Pressure}

\Delta T = |T_{land} - T_{sea}|

💡Examples

Problem 1:

35^\circ C

Solution:

The wind will blow from the sea to the land (Sea Breeze).

Explanation:

T_{land} = 35^\circ C

Problem 2:

A person living in a coastal house notices that the wind blows towards the sea at 11:00 PM. Explain this phenomenon using the concept of heat transfer.

Solution:

At night, the land cools faster than the sea, causing air to move from land to sea.

Explanation:

T_{land} < T_{sea}