Water

 WATER
D1.Name two main natural sources of water.
Ans: Two main natural sources of water are rain and snow.
D2.Name any three inland water bodies.
Ans: Three inland water bodies are pond, lake and river.
D3.Write one use of water in canals.
Ans: Canals water are mainly used for irrigation.
D4.Name two main rivers of north India.
Ans: Ganga and Brahmaputra are two main rivers of north India.
D5.State two method of drawing ground water.
Ans: Ground water can be drawn by help of Rehat and Pulley.
E1.How is snow a source of water?
Ans:In winter ,there is normally heavy snow fall on the mountains. During summer a part of this snow melts and changes into water. This water flows down the mountains into rivers and lakes which become  main sources of water for people.
 E2.How is a dam useful for generating electricity?
Ans: In a dam huge amount river water are stored. The stored water is allowed to fall from a high place which rotates the turbine and generate hydroelectricity.
E3.Why does plants looks greener after rain?
Ans: Before rain the leaves are covered with dust. Rain water washed away the dust, so leaves look greener after rain.
E4.How is ground water useful?
Ans: Ground water is used by plants for their growth. Ground water is drawn by human being by help of hand pump or bore well for different uses.
E5.Why are picnic spots often developed around or near lakes?
Ans: Water is very essential for cooking, washing hand and drinking during picnic. Water present water lakes and river are used for boating and water sports. So picnic spots are developed near or around water bodies.

Extra questions and answer
Q1.what is a dam?
Ans:A dam is  a man made reservoir where huge amount of river water are stored and utilized for hydroelectricity and irrigation.
Q2.What do you mean by irrigation?
Ans:The process of watering the plants or crops  by human being in absence of rain is called irrigation.
Q3.what is ground water?
Ans:A part of rain water which soaks into the ground and stored under ground  in a big  rock is called ground water.
Q4.Find out name of the following.
a)Dams near Bhubaneswar: Deras &Jhumaka
b)River flows near Bhubaneswar:Daya
c)Longest river of the world:Nile
d)longest river of India:The Ganga
e)Longest river of Odisha.: Mahanadi


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