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प्रश्न
How are clouds formed?
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उत्तर
During day time, on being heated, a large amount of water evaporates from various water bodies and goes into the air. A part of this water vapour also reaches the atmosphere through biological activities such as transpiration and respiration. This causes the air in the atmosphere to heat up. When this heated air rises, it expands and cools, which results in the condensation of water vapour forming water droplets. The presence of dust and other suspended particles in air also facilitates the process of condensation. The formation of water droplets leads to the formation of clouds.
संबंधित प्रश्न
Explain the importance of carbon dioxide for (a) photosynthesis (b) warming the earth’s environment. State what would happen if excess carbon dioxide as a pollutant is released into the atmosphere.
Fill in the blank:
The ozone layer protects us from the _____________ of the sun.
Write True or False.
CFCs and BFCs protect the ozone layer.
State any three characteristics of the mesosphere.
Write a note about the following.
Condensation
Write the significance of the following gases.
Oxygen __________________
Carbon dioxide __________________
Ozone __________________
Large jet planes normally fly here ______.
Why mountain climbers carry oxygen while climbing?
A ______ shows the direction in which the air is moving at a particular place.
The ozone layer protects all life on earth from the harmful ______ rays of the sun.
