Important overpopulation terms.
Underpopulation, (also called underinhabitation), is the opposite of overpopulation, where less people live in a location than the space, economic and natural resources can sustain.
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 less people live in that same area size. For example 100 people per square kilometer would be higher density area compared to 40 people per square kilometer.
Can you guess what the terms Densely Populated and Sparcely Populated mean?
The number of people leaving the community or coming into that community within that period of time.
Crude birth/death rates:
This is the number of live births in a year by a population of 1,000 living people in a given location. Crude simply means raw or unrefined. The crude death rate is the number of deaths among 1000 people in a year, in a given location.
is the study of human populations (statistics, distribution, composition, birth and death rates etc). A scientist who studies demography is called a Demographer.
The total increase in the number of people (or species) resulting from the combined effect of births, deaths, and migration over in a given period of time. Population decrease is the opposite of this.
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.