POWERPOINT PRESENTATION

OF

TOPIC:POPULATION

BY:saurav

IX-B30

A population is a summation of all the organisms of the same group

or species, who live in the same geographical area, and have the

capability of interbreeding.[1][2] In ecology the population of a certain

species in a certain area is estimated using the Lincoln Index. The area

that is used to define a sexual population is defined as the area where 

inter-breeding is potentially possible between any pair within the area.

The probability of interbreeding is greater than the probability of cross-

breeding with individuals from other areas. Under normal conditions,

breeding is substantially more common within the area than across the

border.[3]

population

POPULATION OF INDIA

The demographics of India are inclusive of the second most populous

 country in the world, with over 1.21 billion people (2011 census), more than a

sixth of the world's population. Already containing 17.5% of the world's

population, India is projected to be the world's most populous country by 2025,

surpassing China, its population reaching 1.6 billion by 2050.[4][5] Its population

growth rate is 1.41%, ranking 102nd in the world in 2010.[6] Indian population

reached the billion mark in 2000.

India has more than 50% of its population below the age of 25 and more than

65% below the age of 35. It is expected that, in 2020, the average age of an

Indian will be 29 years, compared to 37 for China and 48 for Japan; and, by

2030, India's dependency ratio should be just over 0.4.[7]

POPULATION GROWTH RATE:  1 .28% (2013 EST. )

: The average annual percent change in the population,

resulting from a surplus (or deficit) of births over deaths and the

balance of migrants entering and leaving a country. The rate may

be positive or negative. The growth rate is a factor in determining

how great a burden would be imposed on a country by the

changing needs of its people for infrastructure (e.g., schools,

hospitals, housing, roads), resources (e.g., food, water,

electricity), and jobs. Rapid population growth can be seen as

threatening by neighboring countries.

CENSUSA census is the procedure of systematically acquiring and recording 

information about the members of a given population. It is a regularly

occurring and official count of a particular population. The term is used mostly

in connection with national population and housing censuses; other common

censuses include agriculture, business, and traffic censuses. The 

United Nations defines the essential features of population and housing

censuses as "individual enumeration, universality within a defined territory,

simultaneity and defined periodicity", and recommends that population

censuses be taken at least every 10 years. United Nations recommendations

also cover census topics to be collected, official definitions, classifications and

other useful information to coordinate international practice.

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