Question 3 :
An atoll is a ring of low coral islands surrounded by a body of sea water. Which term is used for this body of water?<br>

Question 4 :
In the ocean, water moves horizontally over vast areas due to ____________________.

Question 6 :
King Ghadsi of _____ got made Ghadsisar lake 650 years ago.

Question 7 :
Supplying water to agricultural lands through canals, wells and tanks is called ______.

Question 8 :
It is important to make small check dams across the flooded gullies because they-<br/>(i) &#160;&#160;hold water for irrigation.<br/>(ii) &#160;hold water and prevent soil erosion.<br/>(iii) &#160;recharge ground water.<br/>(iv) &#160;hold water permanently. <br/>Select the correct options from the above stated reasons-<br/>

Question 9 :
Match the following:List I &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160;&#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; List II<br/>&#160; &#160; &#160; (A) &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160;(B)<br/>A - Land use&#160; &#160; &#160; &#160; &#160; &#160; 1 - &#160;Prevent soil erosion&#160;<br/>B - Humus&#160; &#160; &#160; &#160; &#160; &#160; &#160; &#160;2 - Land suitable for agricultureC - Rock dams&#160; &#160; &#160; &#160; 3 - Productive use of land<br/>D - Arable land&#160; &#160; &#160; &#160;4 - Organic matter deposited on topsoil

Question 11 :
Rows of trees planted in the coastal areas to check the wind movement are called as intercropping.<br/>

Question 12 :
What is India's rank in the world with respect to the amount of water available per person per year?

Question 15 :
By which year is India anticipated to suffer from absolute scarcity of water resources?

Question 16 :
Which of the following factor is helpful in controlling the soil degradation?<br/>