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Lec 2 hydrosphere.pptx

Lec 2 hydrosphere.pptx - Lecture-2 Spheres of the Earth...

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Lecture-2: Spheres of the Earth Hydrosphere Course Instructor: Md Asif Rahman (ASR) Lecturer, Department of Mathematics and Natural Sciences (MNS) University Building 2 (15 th Floor) E-mail:
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Hydrosphere The hydrosphere describes the waters of the earth. About 71% of the Earth’s surface is covered by water. Water of the hydrosphere exists in three forms: liquid, solid and gaseous (water vapor). Water occurs in two general chemical conditions, fresh and salty . It also occurs as standing water (in oceans and lakes ) and running water (in rivers and streams ). It consist of water in the oceans; lakes, streams, rivers, swamps জললভ ভ মম on the surface of the land & under the ground (ground water). It also consists of water frozen as ice and snow, icebergs, glaciers, p ermafrost , himalayas and in the frozen layers of soil and as water vapor in the atmosphere.
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The Structure of Hydrosphere Oceans and seas - 96.5 % of water Fresh water – 3.5 % of water Fresh water distribution: Ice: 1.762% Groundwater: 1.7% Surface Fresh Water: 0.014% Atmosphere and Soil: 0.002%
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Largest water body: Oceans - the largest bodies of water on Earth (contains salt water only) Solid forms of water (forms of ice): Icebergs( বরফ খন ) :
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