Magnetic Dip and Magnetic Declination

Magnetic Dip The vertical angle between magnetic needle and earth surface is called angle of dip. Magnetic Dip at equator is 0 degree. Magnetic Dip at pole is 90 degree. Dip is positive if needle points towards the ground. Dip is negative if needle points away from the ground. Declination The horizontal angle between magnetic meridian and true meridian is called declination. Magnetic declination is positive towards east direction. Magnetic declination is negative towards west direction. Isogonic line The line […]

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Classification of Soil on the basis of mode of transportation

Soil is formed by disintegration of rocks. The disintegrated rock particles then get transported by different natural agents like wind , water, etc either to same place as origin of rock or towards new region. The transported soil then gets deposited and keeps on increasing in quantity. Natural events continue to occur , the soil deposited once again get eroded and process of erosion-transportation-deposition-upheaval keeps on repeating. Types of Soil on the basis of mode of transport Alluvial Soil Soil […]

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Geological Classification of Rocks

On the basis of geological occurrence, rocks are classified into three categories: Sedimentary Rocks Rocks formed due to deposition of minerals one over another due to action of water, wind, and other natural agents is called sedimentary rocks. Igneous Rocks Rocks formed due to volcanic action when magma or lava cools down and solidifies is called igneous rocks There are two types of igneous rocks: Plutonic Rocks Igneous rocks which cools down and solidifies inside the earth surface is called […]

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Geography of World – Continent – Asia

Asia is the largest continent on world. Asia covers about 29.92% of world land mass. Over 60% of human population reside on Asia Number of countries : 48 Number of land-locked countries: 12 Deepest Lake : Baikal Lake,Russia Widest Plateau: Tibetan Plateau Highest Plateau: Pamir Plateau, Roof of World Highest Mountain: Mount Everest,Nepal Largest Sea: Caspain Sea Biggest Desert: Arabian Desert Biggest Country:Russia (covers area of both asia and europe), China Smallest Country: Maldives Biggest land-locked country- Kazakshtan Double land-locked […]

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Properties of building stone

Stone is one of building material used for masonry construction. They are large in size and cover greater area with less number. Stones have greater durability and weather resistance property as compared to bricks. Appearance and Texture Stones should have homogenous structure and be uniform in color. When stones are used for face work the appearance is of great importance Weight Stone used for building construction should have specific gravity greater than 2.4. Greater the weight , higher will be […]

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Forms of Brick

There are different forms of brick on the basis on their length breadth and height orientation. Full Brick: If the brick is not disturbed in it’s original 3 dimensional orientation it is called full brick. Half Bat: If the brick is halved from the length. Quarter Bat: If the brick is quarter cut from the length. Beveled Bat: If half bat is cut with it’s width full cut and length side half cut Queen Closer: If the brick is halved […]

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Types of Geological Formation

There are four types of geological formation: Aquifer Aquifer are geological formation which contains water and can yield water. They are porous as well as pervious. They are water bearing strata from which underground water is generally extracted. Aquitard Aquitard are geological formation which contains water but yield is very less as compared to aquifer. They are porous strata but less pervious than aquifer. Aquiclude The geological formation which contains water but doesn’t allow extraction of water is called aquiclude. […]

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