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प्रश्न
Give reasons.
The quality of water is deteriorating.
उत्तर
Though three-fourth of the Earth’s surface is covered with water, almost 98% of it is unfit for use. Oceans and seas, which constitute the major portion of the hydrosphere, contain saline water. The freshwater reserves of the Earth are mostly made up of ice-caps, groundwater, lakes, and rivers. The quantity of water on Earth remains the same. It constantly changes form and circulates between oceans, atmosphere, and land. Considering that the freshwater reserves remain constant and that the world population rises day-by-day, it is important that we use these water resources judiciously. However, due to factors like deforestation, industrial and agricultural pollution of rivers and lakes, wastage of water, pollution of groundwater, etc., the quality of water that is available to many people in this world today is not suitable for human consumption.
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संबंधित प्रश्न
Give reasons.
Ocean water is salty.
Tick the correct answer.
The process by which water continually changes its form and circulates between oceans, atmosphere, and land
Tick the correct answer.
Generally, the warm ocean currents originate near
Match the following.
|
(i) Caspian Sea |
(a) Largest lake |
|
(ii) Tide |
(b) Periodic rise and fall of water |
|
(iii) Tsunami |
(c) Strong seismic waves |
|
(iv) Ocean currents |
(d) Streams of water moving along definite paths |
|
- |
(e) Water cycle |
Very Short Answer Type Question:
What is Tsunami?
Very Short Answer Type Question:
What happens during high Ode?
Very Short Answer Type Question:
What happens during low tide?
Very Short Answer Type Question:
How are tides caused?
Short Answer Type Question:
How are spring and neap tides formed?
What are waves? Write a short note on it.
