Human Population Density, Distribution And Structure
Visão Geral
Stand on a quiet hillside in Wyoming and you may share a square kilometre with two other people. Step into central Monaco and you are one of nearly twenty six thousand. Same planet, wildly different crowding. Three simple ideas let geographers and environmental managers describe this: how many people live in an area (density), where they choose to live within it (distribution), and how the population is built up from young, working and elderly people (structure).
In this lesson you will learn to calculate population density, explain why people cluster near coasts, rivers and cities while deserts and mountains stay empty, and read a population pyramid at a glance. You will compare the youthful pyramid of a low-income country with the top-heavy one of a high-income country, and meet the World Bank income groups used to classify economies. These are the tools every later population and resources topic quietly relies on.
Objetivos
- 7.1.1 Describe where people live in the world in terms of population density and population distribution, limited to: (a) sparsely populated places contain few people and densely populated places contain many people (b) population density: the number of people living in an area, usually measured in people per km2 (c) population distribution: how people are spread over an area.
- 7.1.2 Interpret population pyramids to describe population structure, limited to: (a) young and elderly dependent population (b) working population (c) female and male population.
- 7.1.3 Describe the income groups the World Bank uses to classify the economies of different countries, limited to: (a) low-income countries (LICs) (b) middle-income countries (MICs) (c) high-income countries (HICs).
- 7.1.4 Compare the population structure of an LIC and an HIC.
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- Population density is best defined as: A. The total number of people in a country B. The number of people living per square kilometre C. How people are spread over an area D. The proportion of young and old people Answer: B
- A region has 60 000 people living in an area of 1 500 km2. Its population density is: A. 25 people per km2 B. 40 people per km2 C. 90 people per km2 D. 400 people per km2 Answer: B
- A population pyramid with a very wide base and a narrow top usually shows a country with: A. A low birth rate and an ageing population B. A high birth rate and a young population C. Equal numbers in every age group D. More elderly than young people Answer: B
- Which group of people is usually described as dependent? A. People aged 15 to 64 B. Only adult males C. The young and the elderly D. Factory workers only Answer: C
- The World Bank classifies the wealthiest economies as: A. Low-income countries (LICs) B. Middle-income countries (MICs) C. High-income countries (HICs) D. Less economically developed countries Answer: C
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"Biology: Human Population Growth" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/45-5-human-population-growth. Access for free at https://openstax.org/books/biology/pages/1-introduction
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