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प्रश्न
Explain water cycle in detail.
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उत्तर
It represents the exchange of water between air, land and sea and between the living organisms and the environment.
Two overlapping water cycles are operating in nature:
(i) Global water cycle-
Water evaporates from the hydrosphere (oceans, lakes, rivers seas, ponds) by the heat of the sun and forms clouds. Clouds are carried over to the land by winds. After getting cooled, water in the clouds falls on the earth in the form of rain, sleet and hail. This water again evaporates in the atmosphere and completes the global water cycle.
(ii) Biological water cycle-
Here, the living organisms, i.e., plants and animals, consume water from the global water cycle and return it back. Plants release water in the form of water vapours by the process of transpiration. Animals return water to the air as vapours by the process of respiration and to the soil in the form of fluid by the process of excretion.
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संबंधित प्रश्न
What happens to the water in a wet cloth?
Water present in rivers, lakes, and ponds is unfit for use by human beings.
Seas are formed when the water table meets the land surface.
State for the following whether it is due to evaporation or condensation:
Steam rising from a hot girdle when water is sprinkled on it.
What are balls of ice?
The water vapour gets cooled and changes into tiny water droplets that form ______ in the sky.
Analogy:
Filtering: Sand:: ______: Ammonia.
Which one of the following is not an abiotic factor?
______ is the study of patterns, and processes in the natural world and their modifications by human activities.
______ is the reverse of vaporization.
