EARTHS PHYSICAL FEATURES MOST OF THE EARTHS SURFACE(ABOUT 70%)IS COVERED WITH WATER.THE LARGEST SINGLE BODY OF WATER,IS THE PACIFIC OCEAN,ALONE COVERS 30% OF THE SURFACE. MOST OF THE LAND IS DISTRIBUTED AS 7 CONTINENTS;THESE ARE FROM LARGEST- SMALLER ASIA,AFRICA NORTH AMERICA,SOUTH AMERICA,ANTARTICA,EUROPE&AUSTRALIA.THE PHYSICAL FEATURES OF THE LAND ARE VARIED.AMONG THEM THE MOST NOTABLE ARE MOUNTAIN RANGES,DESERT&RIVERS.THE LARGEST MOUNTAIN RANGES ARE HIMALAYA IN ASIA &ANDES IN SOUTH AMERICA EXTENDED FOR 1000 KMS THE HIMALAYAS INCLUDE WORLDS LARGEST MOUNTAINS MOUNT EVEREST.THE LONGEST RIVERS ARE THE NILE IN AFRICA IN AFRICA (6,695 KM)&THE AMAZON RIVER IN SOUTH AMERICA (6,437 KM).DESERTS COVER ABOUT 20% OF THE TOTAL LAND AREA. THE LARGEST IS SAHARA THAT COVERS THIRD OF AFRICA.THE EARTHS SURFACE FEATURES CAN BE REPRESENTED IN VARIOUS WAYS.ONLY A GLOBE CAN CORRECTLY REPRESENT AREAS,SHAPES,SIZES & DIRECTIONS BECAUSE THERE IS ALWAYS DISTORTION WHEN A SPHERICAL THE EARTHS SURFACE FOR EXAMPLE IS PROJECTED ON TO A FLAT SURFACE OF A MAP. EACH MAP PROJECTION IS THEREFORE COMPROMISE : IT SHOWS SOME FEATURES ACCURATELY BUT DISTORTS OTHERS. EVEN SATELLITE MAPPING DOSE NOT PRODUCE COMPLETELY ACCURATE MAPS,ALTHOUGH THEY CAN SHOW PHYSICAL FEATURES WITH GREAT CLARITY.
Posted on: Tue, 14 Oct 2014 01:53:22 +0000
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