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1) Population distribution means the pattern of where people live. World population distribution is uneven. Places which are sparsely populated contain few people. Places which are densely populated contain many people. ... Population density is calculated by dividing the number of people by area.
2) Under-population is when a region or country has insufficient workers to exploit their resources efficiently, to support retired populations and to provide growth. i.e. too few people to use all the resources of an area to the maximum efficiency.
3) Overpopulation or overabundance occurs when a species' population becomes so excessive that people deem it must be managed. It can result from an increase in births (fertility rate), a decline in the mortality rate, an increase in immigration, or a depletion of resources.
4) china=1,439,323,776
India=1,380,004,385
5) Greenland, Svalbard, Falkland islands, Pitcairn Islands, Western Sahara, Mongolia, Namibia, Australia, Iceland, Mauritania. The state with the lowest population density is Arunachal Pradesh and the Union Territory with the lowest density of population is Andaman & Nicobar Islands
6) Many of the world's small island or isolated states have large populations for their size. Macao, Monaco, Singapore, Hong Kong and Gibraltar are the five most densely populated. Singapore has nearly 8,000 people per km2 – more than 200 times as dense as the US, and 2000 times that of Australia.
7) Population change is simply the change in the number of people in a specified area during a specific time period. Demographics is the study of population statistics, their variation and its causes. These statistics include birth rates, death rates, migration rates and sex ratios.
8) Three primary factors account for population change, or how much a population is increasing or decreasing. These factors are birth rate, death rate, and migration.
9)Internal migration or domestic migration is human migration within a country. Internal migration tends to be travel for education and for economic improvement or because of a natural disaster or civil disturbance. Cross-border migration often occurs for political or economic reasons.
10) A population pyramid or "age-gender-pyramid" is a graphical illustration of the distribution of a population by age groups and gender; it typically forms the shape of a pyramid when the population is growing.
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