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Showing posts with the label Science

what is Geography ?? || Earth , Science , natural calamities , scientists || chiseled info .

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What is Geography ??          Since their earliest presence on Earth, humans have sought to make sense of their surrounding the behaviour of a volcano , the flood cycles of a river , or the optimum time to cross a mountain pass - and humans developed ways to record and pass on such information . As they ventured from their places of origin , by land and by sea , people aquired a broader perspective of Earth's process and of the partterns and impact of human settlement throughout the world                       Ancient cultures such as the Egyptian , Phoenician and Chinese amassed Geographical understanding , but few of those records survive , and so the Greeks have become today's main source of early knowledge . Homer's epics , The liad and The odyssey , written in the ninth century B.C ., reveal the Greeks as intrepid travelers and keen observers of distant lands . They also excelled in scientif...

THE SCOPE OF GEOGRAPHY || Geography , earth , national Geography || chiseled info

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The scope of Geography Geography : From the Greek geo , Earth ,+ graphic , write about or describe . The systematic study of the physical Earth and it's human population - where things are and how they got there . The field is divided into two major areas : physical geography and human geography. Today Geography is rooted in location , but it involves more than the position of place - names on the map . It Integrates methods and knowledge from many different disciplines and encompasses both the physical and the social science . It links all these disciplines to determine why things happen in a particular location or according to particular spatial patterns .              Physical geography incorporates geology , climatology , biology , ecology , hydrogeology and other natural sciences. Human geography includes cultural anthropology , economics , political science , history , demography and other social science . Cartography , wh...

Standard Map Projection || conical projections , cylindrical projections and Azimuthal projections

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Standard Map Projection Conical Projections -- Are made as if a large paperncone rested on the top of the globe , with its point above the North Pole and it's norom edge touching the globe somewhere north of the Equator . When the cone is cut , a flat map unfolds , shaped like a fan . Conical Projections are best for showing areas in the middle latitudes. Cylindrical Projections -- Show the globe as if it were projected onto a large sheet of paper surrounding it . Those points around the centre , near  the Equator , appear accurately , but area's near the Poles are stretched , causing landmarks far to the North and South to look much larger than they really are . Azimuthal Projections -- This projections are also called plane or zenithal projections . To create  these , the map maker designates one point of the globe as the centre of the map - the point can be any  where and projects an image as if a flat piece stuff paper were resting there. ...

Changing Fashions in World Maps || Chiseled info

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CHANGING FASHIONS IN WORLD MAPS . No one world map protection can do it all - accurate distance, direction shape , and area . Over the years , different projections have come to the forefront .              The Winkel Tripel projections , adopted in 1998 by the National Geographic Society , is most often chosen today for general reference.                          The Robinson projection was favoured for classrooms and textbooks from 1988 to 1998.           The Van der Grinten projection was used by the National Geographic Society for most of it's political maps from 1922 into the 1980s .              The Mercator projection , centuries old and test still broadly used , also distorts the relative sizes of Landmasses in high latitudes. Fast Facts -- The first scholar to discribe a conical map projection was...

WHAT CITIES ARE ON THE TROPIC LINES ??

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WHAT CITIES ARE ON THE TROPIC LINES ? The Tropic of Cancer Runs Through -- 1]  Guangzhou, China 2] Bhopal , India  3] Muscat , Oman 4] Little Exuma , Bahamas  5] Mazatlan , Mexico THE TOROPIC OF CAPRICORN RUNS THROUGH -- 1] Longreach, Australia 2] Toliara , Madagascar 3] Rehoboth , Namibia 4] Sao Paulo , Brazil 5] Tubuai , French Polynesia That's all in this article 😃, Please make sure to follow my blog/website. Thank you

WHAT CAUSES THE SEASON CHANGE ??|| Monsoon , winter , spring , autumn , summer || Chiseled info .

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What causes the season Change ?? The changing seasons occur because the Earth , tilted on its axis , orbits the sun . THUS ,the plane of the equator is tilted with respect to the plane of the Earth's orbit . Since the Earth is always tilted in the same direction , the latitude at which the sun appears directly overhead at the noon changes as the Earth orbits the sun . The sun appears to follow a yearly partten of the northward and southward motion in the sky. If the equatorial plane and the orbital plane were the same , the sun would always be directly overhead at noon to an observer at the equator , and there would be no change of seasons. However , since the planes are tilted about 23° 30' from each other , the latitude at which the sun appears directly overhead at non varies throughout the year . Following centuries of tradition, astronomers divide the year into seasons according to equinoxes and solstices . The equinoxes occur when the Earth reches t...

what is Geomagnetism ?? || magnetic,earth,space, geography, Geomagnetism.|| Chiseled info

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WHAT IS GEOMAGNETISM ? Scientists believe that Earth's magnetism aries from electric currents generated by the movement of hot liquid iron in it's core .The currents create a magnetic field with invisible lines of force flowing between Earth Geomagnetic poles . These are not the same as the North and South Poles and , more significant , they are not stationary . The Geomagnetic poles mark the ends of the axis of Earth's magnetic field.  In 1971 a group of scientists investigating a 30,000 year old aboriginal campsite in Australia discovered that the fire's heat had allowed iron particles in the stone to realign with Earth's magnetic field at the time . What's more , the iron particles pointed south, indicating that magnetic north at that time must have been somewhere in the Antractic . The discovery confirmed other recent reversal of the Earth's magnetic field. It is now understood that major reverals in Earth's magnetic field occ...