Chapter-2
The World Population
The World Population
CLICK ON THE ABOVE IMAGE FOR BETTER EXPLANATION 👆👆👆
PATTERNS OF POPULATION
DISTRIBUTION IN THE WORLD
DISTRIBUTION IN THE WORLD
The term population
distribution refers to the way people are spaced
over the earth’s surface. Broadly, 90 per cent of
the world population lives in about 10 per cent
of its land area
distribution refers to the way people are spaced
over the earth’s surface. Broadly, 90 per cent of
the world population lives in about 10 per cent
of its land area
DENSITY OF POPULATION
Each unit of land has limited capacity to
support people living on it. Hence, it is
necessary to understand the ratio between the
numbers of people to the size of land.
Density of Population = Population/Area
FACTORS INFLUENCING THE
DISTRIBUTION OF POPULATION
DISTRIBUTION OF POPULATION
I. Geographical Factors
II. Economic Factors
III. Social and Cultural Factors
POPULATION GROWTH
- Growth of Population : Change of
population in particular area between two
points of time - Growth Rate of Population : This is the
change of population expressed in
percentage. - Natural Growth of Population: This is the
population increased by difference between
births and deaths in a particular region
between two points of time.
Natural Growth = Births – Deaths
Actual Growth of Population : This is
Births – Deaths + In Migration – Out
Migration
Actual Growth of Population : This is
Births – Deaths + In Migration – Out
Migration
- Positive Growth of Population: This
happens when the birth rate is more than
the death rate - Negative Growth of Population: If the
population decreases. It occurs when the birth rate falls
below the death rate
Components of Population Change
There are three components of population
change – births, deaths and migration.
The crude birth rate (CBR) is expressed as
number of live births in a year per thousand of
population. It is calculated as:
CBR=Bi/P×1000
Death rate plays an active role in
population changeCDR is expressed in terms
of number of deaths in a particular year per
thousand of population in a particular region.
CDR is calculated as:
population changeCDR is expressed in terms
of number of deaths in a particular year per
thousand of population in a particular region.
CDR is calculated as:
CDR=D/P×1000
Migration:-
Immigration: Migrants who move into a new
place are called Immigrants.
Emigration: Migrants who move out of a
place are called Emigrants.
place are called Immigrants.
Emigration: Migrants who move out of a
place are called Emigrants.
TRENDS IN POPULATION GROWTH
In the early periods population of the world
grew very slowly. It is only during the last few
hundred years that population has increased
at an alarming rate.
grew very slowly. It is only during the last few
hundred years that population has increased
at an alarming rate.
DEMOGRAPHIC TRANSITION
The theory tells us that population of
any region changes from high births and high
deaths to low births and low deaths as society
progresses from rural agrarian and illiterate to
urban industrial and literate society. These
changes occur in stages which are collectively
known as the demographic cycle.
any region changes from high births and high
deaths to low births and low deaths as society
progresses from rural agrarian and illiterate to
urban industrial and literate society. These
changes occur in stages which are collectively
known as the demographic cycle.
POPULATION CONTROL MEASURES
- Family planning is the spacing or preventing
the birth of children - Thomas Malthus in his theory
stated that the number of people would
increase faster than the food supply. - The preventive checks are better than the physical check
FREE PDF:- DOWNLOAD
No comments:
Post a Comment