GEOGRAPHY (PLATE TECTONIC,MOUNTAINS & DESERTS)

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PLATE TECTONICS

Plate tectonics is a scientific theory describing the large-scale motion of seven large plates and the movements of a larger number of smaller plates of the Earth's lithosphere.
Theory is based on continental drift which
explains the formation of various continents over millions of years as we see them today.

Plate Boundaries

Based on the relative movement between

two tectonic plates, there are three types of plate boundaries.

They are as follows:

Convergent Boundary: In this case, the two adjacent tectonic

plates move towards each other.

Divergent Boundary: In this case, the two adjacent plates

move away from each other.

Transform Boundary: In this case, the two adjacent plates

move along their borders.

MOUNTAIN FORMATION

MAJOR MOUNTAIN RANGES OF THE WORLD

ü Andes -South America

ü Himalayas-Karakoram-Hindukush -South Central Asia

ü Rockies -North America

ü Great Dividing Range-East Australia

ü Western Ghats-Western India-

ü Caucasus Europe-Asia

ü Alaska -USA

ü Alps -Europe

ü Apennines -Europe

ü Ural -Asia

ü Pennines -Europe

ü Pyrenees-Europe

ü Appalachian -North America

HIGHEST MOUNTAINS IN THE WORLD

DESERTS IN THE WORLD

A desert is a barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life. 

Deserts are formed by weathering processes as large variations in temperature between day and night put strains on the rocks which consequently break in pieces. Although rain seldom occurs in deserts.

REASONS OF DESERT FORMATION

(1) Natural Situation

(2) Air Circulation Pattern

(3) Currents: A Hot Water Heating System

(4) Oceanic Currents

(5) Remote Situation from an Oceanic Moisture

(6) Mountain Barrier

(7) Rainless

(8) Temperature

(9) Man, in Desert Making

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