chapter 2 population key issues 1.where is the worlds population distributed? 2.where has the worlds...
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Chapter 2 Population
Key Issues 1. Where is the worlds population
distributed? 2. Where has the worlds population
increased 3. Why is population increasing at different
rates in different countries? 4. Why might the world face an over
population problem?
http://www.youtube.com/watch?v=E8dkWQVFAoA
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Key Issue 1- Where is the Population Distributed?
– Pg 40 cartogram
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• demography - The study of population characteristics
• Geographers look at – where– Why– the scale of population in different
regions,
– Why could this be a problem?
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Three Reasons for Studying Population
1. There is more people alive today then any other time in history
2. The population rate has increased more then any other time
3. Almost all population growth can be found in LDC
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Earth’s Population History
1 billion reached circa 1830
2 billion reached 1930 (100 years later)
3 billion reached 1959 (29 years later)
4 billion reached 1974 (15 years later)
5 billion reached 1987 (13 years later)
6 billion reached 1999 (12 years later)
Source: Kuby, HGIA
7 billion reached 2011 (12 years later)
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•
http://www.greenberg-art.com/.Toons/.Toons,%20Environ/PopulationTrain.html
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The study of population is important for three reasons
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Population Distribution
• Distribution- the pattern of people across the earths surface– Unevenly and around water
• ¾ of the pop lives on 5% of the earths surface • Ecumene- sustained population
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The World Today: More Than Seven Billion
People
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Distribution by Latitude
Source: http://paul.kedrosky.com/archives/2010/08/world_populatio.html
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Distribution by Longitude
Source: http://paul.kedrosky.com/archives/2010/08/world_populatio.html
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Global Population: 2/3 of the World in 4 Major Clusters
• East Asia– More than 1.5 billion people– More than 20% of humanity– About 20% of humanity in
China– About 50% rural
• South Asia– More than 1.5 billion people– About 20% of humanity– Nearly 20% of humanity in
India– About 60% rural
• Southeast Asia– About ½ billion
people– 8% of humanity– More than 2/3 rural
• Europe– About ¾ billion
people– 11% of humanity– About ¾ urban
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• East Asia – ¼ the earth population live here
• China, Japan, Korea, Taiwan – Of this 5/6 of these people live in China
» Over 3/4ths of these inhabitants live in rural areas – Japanese and Taiwanese 3/4ths live in urban areas
• South Asia – 1/5th the population lives in India, Pakistan,
Bangladesh, Sri Lanka • Along the Indus River and the Ganges
– 3/4ths of these people live in rural settings
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• Southeast Asia – 4th largest area of population, Java, Sumatra,
Borneo, Papua New Guinea and the Philippines
– The three Asian regions consist of over half the worlds population
• Europe – 3rd largest population cluster, 18th the people
on earth • 3/4ths these people live in the cities
– England, Germany and Belgium hold the highest population
– They do not produce enough agriculture to support their population where do they get their food?
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• Eastern North America– 2% of the population, located along the
eastern U.S.A. and the southeast Canada • 95% of these people live in the cities
• Sparsely Populated Regions – Ecumene- portion of the earth that
permanently populates an area • People avoid certain areas, Why? What are
some examples?
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ECUMENE
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• Dry Lands – 20% of the earth surface, the largest include the
Sahara, Arabian, Thar, Takla Makan, Gobi • Lack of natural resources, such as what? • What natural resource do they have?
• Wet Lands – 50 inches of rain a year, high heat and rain deplete the
soil • Southeast Asia, South America
• Cold Lands – North and South poles covered in Permafrost
• Cant grow right? • High lands
– Steep snow covered, Mexico is an exception living about 7,360 ft above sea level
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Arithmetic Population Density
Fig. 2-4: Arithmetic population density is the number of people per total land area. The highest densities are found in parts of Asia and Europe.
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• Population Density – Number of people occupying land
• Arithmetic Density – Total # of people divided by land mass
• U.S. has 77 persons per sq. Mile – This number adjust as you measure
different aspects, Manhattan has about 55,400 per sq. mile, why?
– This explains the where question
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Fig. 2-5: Physiological density is the number of people per arable land area. This is a good measure of the relation between population and agricultural resources in a society.
Physiological Density
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• Physiological Density – Arable land- Farm Land
• # of people supported by Arable land – U.S. 404 persons per sq mile, Egypt 9073 per sq,
shows us that Egypt must feed more people with this land
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Agricultural Density
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• Agricultural Density – Two places can be similar but their Farming
Density could be different • The ratio between farmers and the amount of farms
– U.S. has 4 per sq kilo, Egypt has 1401 per sq Kilo» What can this tell us about technology and where
production is being made
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