Underpopulation:

Underpopulation, also known as under-inhabitation, occurs when a location has fewer people than can be supported by its space, economic, and natural resources over some time.

Population Density:

The number of inhabitants living in a specific area. High population density means more people live in a specific area size, and low population density means fewer people live in that same area size. For example, 100 people per square kilometer would be a higher density area compared to 40 people per square kilometer.

Can you guess what the terms Densely Populated and Sparsely Populated mean?

Migration:

The number of people leaving the community or coming into that community within that period.

Crude birth/death rates:

The crude birth rate refers to the number of live births per 1,000 individuals in a specific area over a year. It is called “crude” because it is a raw or unrefined measurement. Similarly, the crude death rate is the number of deaths per 1,000 individuals in a given area during one year.

Demography:

This is the study of human populations (statistics, distribution, composition, birth and death rates, etc). A scientist who studies demography is called a Demographer.

Population increase:

The total increase in the number of people (or species) resulting from the combined effect of births, deaths, and migration over a given period. Population decrease is the opposite of this.

Population Pyramid:

This is a chart (usually a vertical bar chart) showing the distribution (make-up) of a population by age and gender. The pyramid shows males on the left and females on the right and young age groups at the top.