Fill in the blanks:

1. About 90 percent of the world population lives in ____________ percent of its land areas.
2. The rapid growth in population is called ____________.
3. ____________ is the most densely populated country in the world.
4. Population density of the world is about ____________ persons per square kilometre.
5. ____________ between the age of ____________ and ____________ comprise the working population of a country.
6. India has the world's largest ____________ population.

Distinguish between Overpopulation and Underpopulation.

Distinguish between Birth Rate and Death Rate.

Distinguish between Immigration and Emigration.