Question 2 :
The outermost solid layer of the earth is known as _________.

Question 3 :
Which of the following gases protects us from harmful sun rays?

Question 5 :
The sand particles in Indian Desert are uniformly rounded because of :

Question 6 :
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/><div>(iv) &#160;hold water permanently. <br/></div><div>Select the correct options from the above stated reasons-<br/></div>

Question 9 :
Red Sea is located in Indian Ocean. What is its total area?<span><br></span>

Question 13 :
What are the factor responsible for erosional transportational and depositional work?<br>

Question 16 :
Which one of the following is the main cause of land degradation in Punjab?<br>