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APHUG Unit 2 Part 4
Term | Definition |
---|---|
Physiological Density | The number of people per unit area of arable land, which is land suitable for agriculture. |
Population pyramid | A bar graph that represents the distribution of population by age and sex. |
Sex ratio | The number of males per 100 females in the population. |
Total fertility rate (TFR) | The average number of children a woman will have throughout her childbearing years. |
Zero population growth (ZPG) | A decline of the total fertility rate to the point where the natural increase rate equals zero. |
Asylum seeker | Someone who has migrated to another country in the hope of being recognized as a refugee |
Brain drain | Large-scale emigration by talented people. |