Question

Why the rate of transpiration increases on a hot , windy day ?

Answer 1

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The rate of transpiration increases on a hot, windy day because wind causes faster movement of air and remove the moist air and faster evaporation of water and therefore higher rate of transpiration.

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Answer 2

The rate of transpiration increases on a hot , windy day because of velocity of wind.

• By disrupting the boundary layer, the still layer of water vapour hugging the surface of the leaves, wind can change rates of transpiration.
• Because the channel for water to reach the atmosphere is shorter when the boundary layer is reduced by wind, the migration of water from the leaf surface increases.
• With an increase in wind speed, more people will perspire.
• The area outside the leaf does not become saturated with water vapour when the wind blows quicker because it removes the water vapour produced during transpiration more quickly.
• Therefore, a windier day than a quiet day records a higher rate of transpiration.

Hence, the rate of transpiration increases on a hot , windy day.

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