Indian Administrative Service Notes

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features of world's physical geography

Salient features of world's physical geography

Earth is splendid terrestrial haven. It is imperative to know physical
geography through its display of environmental diversity.

Structure of earth

Earth's structure is divided into three zones that include crust, Mantle and
core.

Crust is the solid outer layer of the Earth, and its depth is usually never
more than 1 per cent of the Earth's radius, or averaging 40–50 km, but this
varies significantly around the sphere.

These are two different types: oceanic and continental. Mantle is the region
within the Earth's interior that range from 25 to 70 km below the surface, to
a depth of ~2,900 km.

It is composed mainly of silicate rocks, rich in iron and magnesium. At the
base of the mantle, temperatures may reach up to 5,000°C.

Physical geography:

Geographic knowledge and studies often start with locational information.

The location of a feature usually uses one of two methods: such as absolute
location, which is articulated by a coordinate system (or address), or relative
location, which recognizes where a feature exists in relation to something
else, usually a fairly well-known location.

Physical geographers are more concerned in exploring the environmental
features and processes that merge to make a place unique, and they are also
involved in the shared characteristics between places.

Climate and topography

Every year, there is deforestation to provide land for ranches and farms.

Bodies of Water in South America include The Amazon River which is the
second longest river in the world.

Furthermore, South America has the Orinoco River and the Rio de la Plata.

Main population of South America lives on or near these river systems.

Climate of South America is warm because it lies near the equator

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