Class 9 Geography


NCERT Exercise Solution

Part 2

Question 7: Define age structure, death rate and birth rate.

Answer: Age Structure: Relative percentage of various age groups in the population is called age structure of the population. Age group is generally divided into children (upto 14 years), working age (15 – 59 years) and aged (60 years and above).

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

Birth Rate: The number of live births per 1000 persons is called birth rate.

Question 8: How is migration a determinant factor of population change?

Answer: Migration within the country is called internal migration, while that between two countries is called international migration. Internal migration has no change on population size but it changes the population composition of a particular area. International migration can lead to a growth or degrowth in population; depending on the degree of immigration and emigration.

Question 9: Distinguish between population growth and population change.

Answer: Population growth is about increase or decrease in the population. Population change is about changes in population composition; like age structure, sex ratio, literacy rate, occupational structure, etc.

Question 10: What is the relation between occupational structure and development?

Answer: Occupational structure greatly affects the development of a country. A large portion of the Indian population is still dependent on the primary sector for employment; which is one of the reasons for lack of development in India. Examples of developed nations suggest that when a greater portion of population engages in secondary and tertiary activities, it leads to proper development.

Question 11: What are the advantages of having a healthy population?

Answer: A healthy population helps in building a productive workforce for the country. Even the non-productive age group needs to be healthy to reduce the burden of healthcare. Healthy children would grow into healthy adults and would be able to contribute better in the economy. Healthy elders would mean less drain on the resources.

Question 12: What are the significant features of the National Population Policy 2000?

Answer: NPP 200 has put special emphasis on the adolescent population. Focus is given to special nutritional needs of the adolescents. Awareness programmes are conducted to increase awareness about STDs, unwanted pregnancies, child marriage, risks of unprotected sex, etc.