31- Which of the following soil conservation method is used in coastal and dry region?
(A) Rock dam
(B) Intercropping
(C) Mulching
(D) Shelter belts
32- In……………………..method rows of trees are planted to check wind movement to protect soil cover.
(A) Mulching
(B) Intercropping
(C) Shelter belts
(D) None of the above
33- Water is a ……………………
(A) Non- renewable resource
(B) Renewable natural resource
(C) Both A and B
(D) None of the above
34- What part of earth is covered with water?
(A) 3/4
(B) 4/3
(C) 2/3
(D) 1/3
35- The earth is covered with ¾ part of earth therefore it is called ………………..
(A) White Planet
(B) Black Planet
(C) Water Planet
(D) Green Planet
36- Life began almost …………..billion years ago.
(A) 3.5
(B) 4.5
(C) 5.5
(D) 6.5
37- Fresh water account………………%
(A) 2.7
(B) 3.8
(C) 4.9
(D) None of the above
38- …………..% water occurs as Ice sheets and glaciers in Antarctica, Greenland and mountain ranges.
(A) 80
(B) 70
(C) 60
(D) 55
39- Only …………. % water is available for human use and it is found as ground water, as surface water in rivers and lakes and as water vapors.
(A) 0.01
(B) 0.1
(C) 1
(D) 2
40- Most precious substance on earth is …………………
(A) Ice
(B) River water
(C) Saline water
(D) Fresh water
ANSWERS:
31-(D), 32-(C), 33-(B), 34-(A), 35-(C), 36-(A), 37-(A), 38-(B), 39-(C), 40-(D)