Glossary and Important Information - Population | Social Studies (SST) Class 9 PDF Download

Glossary and Important Information

1.Census : Official enumeration of population along with certain economic and social statistics in a given teritory, carried out on a specific day. It is generally conducted periodically.

2. Migration : The movement of people across regions and territories. Migration can be internal (within the country) or international (between the countries). Internal migration does not change the size of the population, but influences the distribution of population within the nation. 

3. Population: Population refers to the total number of inhabitants in a particular geographic area. 

4. Birth Rate : The number of infants born for every 1000 persons in a year.

5. Death Rate : The number of deaths per 1000 persons a year is called death rate.

6. Density of population : The average number of persons per unit area.

7. Natural increase of population : Difference between birth rate and death rate.

8. Dependency ratio : The ratio between economically working population and the dependent population is known as the dependency ratio.

9. Demography : It is the study of the population statistics, trends and changes over a time based on birth rate, death rate and fertility rate.

10. Age composition : The number of people in different age groups in a country.

11. Occupational structure : It refers to the distribution of country’s people according to different occupations.

12. Population growth : It is the change in the number of inhabitants of a country during a specific period of time.

13. Literate :  According to the census 2001, a person aged 7 yrs and above who can read and write with understanding in any language is treated as literate.

14. Adolescence : It is a period in which a person is no longer a child and not yet an adult. Such persons are grouped in the age group of 10-19 years.

15. Infant Mortality Rate: Infant mortality rate refers to the number of deaths of infants under one year of age per 1,000 live births in a given population within a specified period of time. 

16. Annual Growth Rate: Annual Growth Rate refers to the rate or the pace of increase of population. It is studied in per cent per annum.

17. National Population Policy: The National Population Policy (NPP) 2000 is a policy framework aimed at achieving various goals, including providing free and compulsory education up to the age of 14, reducing infant mortality rates, ensuring universal immunization against vaccine-preventable diseases, promoting delayed marriage for girls, and prioritizing family welfare as a people-centered program.

18. Population Change: Population change refers to the alteration in the size, composition, or distribution of a population over a specific period of time. This happens due to factors such as birth rates, death rates, immigration, and emigration. 

19. Population Density: Population density is the number of people per unit area in a specific geographic region.