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Q1. How does a water vapour molecule move out of the air space of a leaf
into the atmosphere on a dry day? *
Diffusion
evaporation
transpiration
Active transport

A water molecule moves out of the air space of a leaf into the atmosphere on a dry by the transpiration.

Transpiration:

It is the process by which plants lose their water as water vapor from the stomata of the leaves.

Transpiration creates a suction pressure, this helps to transport water in the plant cell.

Therefore, a water molecule moves out of the air space of a leaf

into the atmosphere on a dry by the transpiration.

To know more about transpiration,

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Transpiration

Explanation:

Water is absorbed from the soil by the root of plants. Majority of the absorbed water is lost in form of vapor through the stomata of the leaf of plants. This process is called TRANSPIRATION in plants. Transpiration is simply the process whereby water escapes from plants into the atmosphere.

The water leaves in form of a gas (vapor) when the plant opens the stomata on its leaves to enable carbondioxide (CO2) needed for photosynthesis come in and oxygen go out as a waste product of photosynthesis. Since, water in a liquid form leaves in a gaseous form, transpiration is therefore the term used for the evaporation of water in plants.

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