11- What is/are the reason behind degradation, landslide, soil erosion and desertification?
(A) Expansion of agriculture
(B) Constructional activities
(C) Both A and B
(D) None of the above
12- What are the common methods used to conserve land?
(A) Afforestation
(B) Land reclamation
(C) Regulated use of chemical pesticide and fertilizers
(D) All of the above
13- …………………is defined as the mass movement of rocks, debris or earth down a slope.
(A) Landslide
(B) Deforestation
(C) Desertification
(D) Afforestation
14- ……………….are often takes pace in conjunction with earthquake, floods and volcanoes.
(A) Deforestation
(B) Landslides
(C) Afforestation
(D) Desertification
15- …………..is a district of Himachal Pradesh where a massive landslide hit Pangi village near Reckong Peo and damaged National highway – 22.
(A) Shimla
(B) Dalhousie
(C) Kinnaur
(D) None of the above
16- National Highway 22 is from…………… – …………….
(A) Hindustan – Sri Lanka
(B) Hindustan – China
(C) Hindustan – Tibet
(D) None of the above
17- The thin layer of grainy substance covering surface of the earth is called …………….
(A) Soil
(B) Crust
(C) Rocks
(D) None of the above
18- ……………is made up of organic matter, minerals and weathered rocks found on the earth.
(A) Organic matters
(B) Soil
(C) Both A and B
(D) None of the above
19- Which of the following statement is correct?
Layers of soil
(a) Top layer of soil is rich in humus and vegetation.
(b) Sub soil contains sand, silt and clay.
(c) Layer below sub soil is weathered rock material.
(d) Bottom layer is made up of parent rock.
(A) Only a and B
(B) Only C and d
(C) All options are correct
(D) None of the above
20- Nature takes …………..to make just one centimeter of soil.
(A) Hours
(B) Days
(C) Months
(D) Hundreds of years
ANSWERS:
11-(D), 12-(D), 13-(A), 14-(B), 15-(C), 16-(C), 17-(A), 18-(B), 19-(C), 20-(D)