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ICSE Class IX Prelims 2020 : Geography

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Geography Time : 3 Hours Maximum Marks : 80 Self Assessment Paper PART I ICSE Solutions 2 1. (a) The Prime Meridian, together with 180 longitude usually divides the earth into the Eastern and the Western Hemisphere. (b) (i) SIAL: Silica and Aluminum (ii) NIFE: Nickel and Iron (c) Dynamic Metamorphism occurs when the transformation of rocks takes place mainly because of high pressure at great depths within the earth s crust. (d) Magma contains silicate material, water vapours and gases. (e) Dunes are found in the tropical deserts of Asia and Africa. (f) Ozone is a form of oxygen. It is present in significant amounts in the earth s atmosphere. (g) The Equator belt experiences high temperatures throughout the year. Thus,the air gets heated, expands and rises, leading to lowering of density. Thus,the pressure is low in polar regions, the cold heavy air is dense and so pressure is high. (h) The pollutants that can be degraded by biological or microbial actions are called as biodegradable pollutants. Example: Domestic garbage (i) Radiations from nature are: (i) Solar radiations (ii) Terrestrial radiations (j) The semi nomadic people of the Tundra region are called as Eskimos. They are found in Alaska, Greenland and northern Canada.

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