Soil is one of the most important natural resources of man. Soils are essential for man for growing crops‚ fodder and limber. Once the fertile portion of the earth’s surface is lost‚ it is very difficult to replace it. In India‚ the destruction of the top-soil has already reached an alarming proportion. Land degradation problems have resulted in increasing depletion of the productivity of the basic land stock through nutrient deficiencies. In addition to the direct loss of crop producing capacity
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Minerals Eight most abundant elements in the Earth’s Crust: Abundance % by weight – Most common Ionic Form Most Common Coordination Numbers Relative Ionic Size Oxygen (O) 46.6 % O-2 - - - 1.40 Silicon (Si) 27.7 % Si+4 Si (4) 0.26 Aluminum (Al) 8.1 % Al+3 Al (4‚ or 6) 0.39 Iron (Fe) 5.0 % Fe+2 Fe (6) 0.63 Calcium (Ca) 3.6 % Ca+2 Ca (8) 1.00 Sodium (Na) 2.8 % Na+1 Na (8) 0.99 Potassium (K) 2.6 % K+1 K (8‚ 12) 1.37 Magnesium (Mg) 2.1 % Mg+2 - - - 0.72 Distinction between crystalline and non-crystalline
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2. 1.1 The particles that make up an atom3 Basic sub-atomic particles‚ each has different properties. Name | Symbol | Approximate relative mass | More accurate mass | Relative charge | Proton | p | 1 | 1.0000 | +1 | Neutron | n | 1 | 1.0016 | 0 | Electron | e | Almost zero | 0.000 547 | -1 | This is the culmination of the work of 5 eminent physicists‚ Dalton‚ Thomson‚ Rutherford‚ Bohr and Chadwick.Their work basically culminates in the ideas above and the important fact that an atom consists
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Geology 101 Universal Knowledge Zoology Political Science Astronomy History Biology Geology Geography | Examples of Time & Geology * Sphinx Precambrian Era: (4.5 billion) * Ended 542 million years ago * Started with no life and evolved bacteria & algae Paleozoic Era: (542 – 251 MYBP) * Fish‚ amphibians‚ etc. were early years * Ended with the Greatest Extinction of all time Mesozoic Era: (251 – 65 MYBP * Dinosaurs ruled and small animals developed
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Introduction: Culture is the set of patterns of human activity within a society or social group and the symbolic structures that give such activity significance. Customs‚ laws‚ popular styles‚ social standards‚ and traditions are all examples of cultural elements. The term culture refers to a state of intellectual development . The social and political forces that influence the growth of a human being are defined as culture. Culture is a total way of life shared by a people in a society.
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Machu Picchu Abstract This paper deals about one of the world wonders Machu Picchu. This paper deals about the geometric and the cultural heritage of Machu Picchu. This paper also deals about the flora and fauna present in that region. This paper mostly concentrates on the architectural features of the Machu Picchu. This paper deals on the characteristic features which made UNO to announce Machu Picchu as one of the world wonders of the Earth. The heritage Machu Picchu is the key topic in
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MINERALS 5 CHARACTERISTICS OF A MINERAL: 1)Naturally Occuring; 2) Be a colid; 3) Have an orderly crystalline structure; 4) have a definite chemical composition; 5) generally be inorganic Which are not classified as Minierals & Why: Gold‚ Water‚ Synthetic Diamonds‚ Ice & Wood: Gold-YES – naturally occurring; Synthetic Diamond: NO – Manmade; Water: NO – liquid state‚ only a solid material can be considered a mineral – in it’s naturally occurring ice state it is a solid and therefore a mineral;
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Monthly Project By-R.Satish Kumar IGCSE ------------------------------------------------- INDEX Sr. No. | Title | Page No. | 1 | Environment | 1 | 2 | Atmosphere | 3 | 3 | Hydrosphere | 8 | 4 | Lithosphere | 13 | 5 | Biosphere | 21 | 6 | Interdependence Between The Four Spheres | 26 | 7 | Human Impact On The Environment | 32 | ------------------------------------------------- ENVIRONMENT The geographical conditions that surrounds the man on the earth
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rock pedestals Wind sculpts stratified rock into pedestals by wind abrasion and weathering‚ e.g. Gava Mountains‚ Saudi Arabia A ridge and furrow landscape. Wind abrasion concentrates on weak strata; leaving harder material upstanding. The Sphinx at Giza may be a modified yardang! - See more at: http://www.revisionworld.com/a2-level-level-revision/geography/arid-and-semi-arid-environments-0/features-produced-wind-erosion#sthash.BIB1z0JR.dpuf Zeugen Wind abrasion turns the desert surface into a
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Geology a science that examines the earth‚ its form and composition‚ and the changes it has undergone and is undergoing involves the knowledge of what happened before and the events occurring within the atmosphere requires not only a study of the materials found on earth but an understanding of the various geologic processes aims to develop an understanding of the earth’s materials and how these materials were changed and modified through the action of natural forces over a period of time Geology
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