5 World and Country Population Totals Distribution and Structure: 3/4 of people live on 5% of earth's surface!Total: 6,400,000,000 as of 3/04/04 (Real Time Pop Clock)Five most populous regions and countriesREGION POPULATION COUNTRY POPULATIONEast Asia 1.5 billion China billionS.Asia 1.2 billion India 986 millionEurope 750 million U.S millionSE Asia 500 million Indonesia 206 millionEast N. A. 120 million Brazil 168 million
6 Geographical Statistics The birthrate is the number of live births per thousand population.The highest birthrate is in Niger.
7 Geographical Statistics The fertility rate shows the average number of children a woman of childbearing years will have in her lifetime.The worldwide fertility rate is 3.0.
8 Doubling TimesThe doubling time is the number of years before a population will be twice as large as it is today.World = 50U.S. = 34MDC = 543LDC = 40Honduras = 22Belize = 19Denmark = 700Russia = never?
9 Fertility Rates2.1 is generally regarded as a replacement rate (the rate at which a population neither grows nor shrinks) in the developed world. In less developed countries this rate should be higher (2.8?).Iran Mexico 2.57USA Haiti 4.3Italy India 3.0Russia China 1.82Why do women choose to have so many children in some countries and not it others?High infant mortalityNo Social SecurityCultural preferences and fashion
10 Geographic Statistics The mortality rate, or death rate, is the number of deaths per thousand people.Nations with high mortality rates often have a large number of elderly people.
11 Geographic Statistics The infant mortality rate shows the number of deaths among infants under age one per thousand live births.To find out the rate of population growth, subtract the mortality rate from the birthrate.
12 Population Distribution Not all of the earth is suitable for human habitation. Ex: Tundra, desert, rain forest.Almost 90% of the Earth’s population lives in the Northern Hemisphere.One in four people lives in East Asia, and one half of the World’s population lives in East or South Asia.
13 Habitable LandsHabitable lands include lands that can support a dense human population.Weather is warm and wet enough to support agriculture.Concentrated along coasts and river valleys.
14 Urban-Rural Mix:More than half of the world’s population lives in rural areas.There are 26 giant cities, or megacities, home to more than 250 million people total.Tokyo is the largest with 28 million inhabitants
15 MigrationMigration refers to the large-scale movement of people from one location to another.Reasons for migration are called push-pull factors.Push factors: reasons that cause people to leavePull factors: draw or attract people to another location.
16 Population DensityTo understand how heavily populated an area is, geographers use a figure called population density.It refers to the average number of people who live in a measurable area, like a square mile.
17 Population DensityNumber can be misleading, especially in large nations. Ex: United States has a population density of 70.3 people per square mile.Alaska has a population density of one person per square mile, while New Jersey has 1,098 people per square mile.
26 Population Pyramids a.k.a. Population DiagramsPopulation StructuresAge-Sex DiagramsAge-Sex StructuresAge-Sex Pyramids
27 Population PyramidAnother way to analyze populations is to use a population pyramid.A population pyramid is a graphic device that shows sex and age distribution of a populationAllows geographers the ability to analyze the effects of wars, famines, or epidemics on a population