Question Text
Question 4 :
In the ocean, water moves horizontally over vast areas due to ____________________.
Question 6 :
It is important to make small check dams across the flooded gullies because they-<br/>(i)   hold water for irrigation.<br/>(ii)  hold water and prevent soil erosion.<br/>(iii)  recharge ground water.<br/>(iv)  hold water permanently. <br/>Select the correct options from the above stated reasons-<br/>
Question 7 :
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 8 :
Supplying water to agricultural lands through canals, wells and tanks is called ______.
Question 9 :
Which of the following factor is helpful in controlling the soil degradation?<br/>
Question 11 :
Which one of the following is the main cause of land degradation in Punjab?<br>
Question 13 :
Which of the following methods are used to restrict soil erosion?<br>A. Ploughing along contour lines<br>B. Strip cropping<br>C. Jhumming<br>D. Mixed farming.
