chapter 4
DESCRIPTION
Chapter 4. The Human World. Section I. World Population. By the end of 2011 we will have 7 BILLION people on earth -roughly 1 billion every 12 years Latinos are growing in numbers 2010 = 49.7 million 2050 = 132.8 million By 2050 3 out of every 10 persons in the US will be Latinos. - PowerPoint PPT PresentationTRANSCRIPT
The Human World
By the end of 2011 we will have 7 BILLION people on earth-roughly 1 billion every 12 years
Latinos are growing in numbers2010 = 49.7 million2050 = 132.8 millionBy 2050 3 out of every 10 persons in the US
will be Latinos
How fast the world population is growing What factors affect population growth?
Demographics
Demography
Death rate – the # of deaths per year for every 1000 people
Birthrate – the # of births per year for every 1000 people
Natural increase (growth rate) – the difference bw an area’s death rate and birthrate
Death rates are lower in more developed countries because of – Improved health careMore abundant food suppliesAdvances in technologyBetter living conditions
Sometimes in wealth industrialized countries you reach ‘Zero population growth’When death rate and birthrate are equal
What is a NEGATIVE effect of zero population growth?
High birthrate is seen in undeveloped countries such as those seen in Africa
Typically tied to religious views
What NEGATIVE effect does high birth rate have?
High birthrates and low death rates greatly increases population growth
Doubling time – the number of years it takes a population to double in sizeUsually occurs in developing countries
Ex: Africa – 25yrs EX: US – 300 yrs
What are NEGATIVE effects of Population Growth?Need for foodOveruse of limited resourcesUneven distribution by age
What are POSITIVE effects of Population Growth? Increase of technology and creativity
When the death rate is higher than the birthrate of that country
What NEGATIVE effects does negative population growth have?Economic consequencesDifficult to find workersClash of cultures
Pattern of human settlement is uneven People live where the following are
availableFertile soilWaterClimate w/o harsh extremes Terrain that allows for human life
In areas where population is highly concentrated, people tend to live in metropolitan areas
How crowded a country or a region is measured by population density
Is it good to have high population density?
Migration – movement of people from place to place
Urbanization – when people move into cities
Emigration v. Immigration
Push Factors Pull Factors
No Jobs War Food shortages Persecution Poverty
Available jobs and opportunities
Religious freedom Political freedom Hope Land
What are some common themes that we see in El Paso when it comes to immigrants?
Useful tool to help you understand population characteristics of a country
Reveals a lot about a countries patterns of fertility, mortality, immigration and history
Population Pyramid
Usually seen in underdeveloped countries
High birthrates Young life
expectancy
Developed country
Roughly the same birthrate and death rate
What else can you interpret?
More females than males
Low birthrate