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प्रश्न
Define ‘eutrophication’.
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उत्तर
Eutrophication: “Organic matter in sewage poured into water bodies generally results in excessive growth of algae – which deoxygenates water and produces deadening atmosphere there.”
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संबंधित प्रश्न
Why do organisms need water?
Water has ...................... density and .................. volume at 4°C.
How are natural springs of water formed ?
How is aquatic life benefited by the fact that water has maximum density at 4oC?
Complete the statement by filling the blank with the correct word from the option.
Solubility of most solids ___ with rise in temperature.
Give reason for the following:
The percentage of oxygen, in air dissolved in water, is higher than the percentage of oxygen in ordinary air.
Match Column I with Column II
| Column I | Column II | ||
| (a) | Ground water | (i) | Solid form of water |
| (b) | Bawri | (ii) | Wastage of water |
| (c) | Snow | (iii) | Water management |
| (d) | Drip irrigation | (iv) | Small water |
| (e) | Leaking taps | (v) | Water table |
From where do the following usually get water? In which form is water present in them?
Plants
From where do the following usually get water? In which form is water present in them?
Aquifer
Which of the following is waste water?
