Unit 2: Population AP Human Geography
Essential (Big) Questions • Where do people live and why do they live where they do? • In which regions is population increasing or decreasing? • Why does population increase or decrease at different rates in different countries? • What are the implications of over and under population?
Critical Issues in Population Geography More people are alive today than at any other time in human history (7 billion +) The world’s population increased at a faster rate during the second half of the twentieth century than ever before. Virtually all population growth today occurs in less developed countries (LDCs) Higher population puts a greater strain on the earth’s resources.
Key Concept: Demography • The scientific study of population characteristics. • Includes the study of the size, structure and distribution of population, and spatial and/or temporal changes in them in response to birth, migration, aging, and death. • The size, structure, and growth of a countries population can affect it’s well-being.
Key Concept: Population Density • Population of a place divided by total area • 10,000,000 people living in 1,000,000 sq. miles would be a population density of ____ per sq. mile (arithmetic density) • However, population is not evenly distributed and density does not remain constant. • Urban areas tend to have higher population density whereas rural areas tend to be less dense.
Key Concept: Population Distribution • Where is population distributed across an the earth? • Major population clusters (2/3 of world pop) • East Asia (China, Japan) • South Asia (India, Pakistan, Bangladesh) • Southeast Asia (Indonesia, Philippines) • Europe (England, Germany, France)
Global Population Distribution Figure 2-2
Why did people live in certain places? • The ECUMENE= the places on earth that people inhabit. • 75% of humans live on 5% of Earth’s surface. • Historically, populations tend to be clustered in areas where: • Food could be grown (arable land) • Fresh water was available • Access/travel was relatively easy
Kaylan’s Question • Could everyone on Earth live in Russia? • Theoretically, YES! • 7 billion people/ 6,592,800 sq. mi.= a population density of 1,061/sq. mi. • For reference, the density of CHI is 11,864/sq. mi
Cities by Population Density • Manila, Philippines: 111,000/sq. mi. • NYC, USA: 27,500/ sq. mi. • Tokyo, Japan: 16,000/sq. mi. • CHI, USA: 11,864/sq. mi. • Palatine, IL, USA: 5,034/sq. mi • Ellsworth, MI, USA: 485/sq. mi
Facts About Population Distribution • 90% live north of the Equator (more land) • 80% live in poorer LDC’s (Latin America, Asia, Africa) • Most live close to sea level • 2/3 live close to oceans…those who live inland live near rivers or lakes. • 50% live in urban areas, 50% in rural • For the 1st time in history, more live in urban areas. WHY?
Sparsely populated regions • People generally avoid: • Dry lands • Wet lands • Cold lands • High lands • People with bad breath