Advertisements
Advertisements
प्रश्न
Answer in your own words.
Why is there a shortage of water even though it occupies about 71% of the earth’s surface?
Advertisements
उत्तर
Although water occupies about 71% of the earth's surface, all of it is not potable water. Most of the water is available in the form of seas and oceans, which are salty in nature. This saline water has its limitations and cannot be used for many purposes. Around 2.7% of water exists in the frozen state or as groundwater, which is inaccessible. Only 0.3% of water is available as potable water, which is fit for human consumption.
संबंधित प्रश्न
Why do organisms need water?
Give reason On opening a bottle of a cold drink, a fizz sound is heard.
What do you mean by water pollution ?
Of the total water available on the earth, fresh water forms ______ percent.
Give the importance of dissolved air – in water.
Select the correct answer of the following statement:
A decahydrate crystal.
Look at the map of Tamilnadu showing annual rainfall and answer the questions given below

- Identify the districts that get only low annual rainfall in Tamilnadu.
- Identify the districts that get a medium annual rainfall in Tamilnadu.
- State the districts that enjoy high annual rainfall in Tamilnadu.
Which of the following is waste water?
Why should we not throw used tea leaves into sink?
Match the items of Column I with the items of Column II with reference to sewage.
| Column I | Column II | ||
| (a) | Inorganic impurities | (i) | phosphorus and nitrogen |
| (b) | Organic impurities | (ii) | nitrates and phosphates |
| (c) | Nutrients | (iii) | cholera and typhoid |
| (d) | Bacteria | (iv) | pesticides and herbicides |
