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प्रश्न
How are clouds formed?
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उत्तर
Clouds are formed by an enormous collection of tiny droplets that are formed by the condensation of water vapours in the air. Water vapours are condensed when dust and other suspended particles of the air act as a nucleus for them. These particles condense the vapours into tiny water droplets.
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संबंधित प्रश्न
Use of excessive .................... by farmers causes water pollution.
Match the statements in column A with that in column B.
| Column A | Column B |
| (a) deliquescent substance | (1) sodium bicarbonate |
| (b) hygroscopic substance | (2) magnesium chloride |
| (c) efflorestance substance | (3) conc. sulphuric acid |
| (d) substance causing temporary hardness | (4) washing soda |
Identify A, B, C and D; first one is done for you.
State any two sources of water pollution.
Water is the most ________ resource on the Earth.
Around 97% of water available on earth is ______ water.
Rivers from land, add minerals to seawater. Discuss how?
In the coastal areas, wind current moves from the sea towards the land during the day; but during the night it moves from land to the sea. Discuss the reason.
State whether the following statement is True or False. If false, give the correct statement.
51% of the earth’s surface is covered with water
A jumbled word is given here. Write the correct form of the word.
QUIFERA
