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Unit 2: Population and Migration

Ideas and reflections on the effective use of Prezi to support whole class teaching

Alicia Reese

on 9 May 2011

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Transcript of Unit 2: Population and Migration

By: Devon Yarbrough Alexis Thomas The First stage of the Demographic Transistion Model has high birth rates and death rates and no population growth.

The Second Stage is commonly known as Early Expanding birth rates remain high and Death rates are falling and the population begins to rise. what is a year for every In Stage 3 Birth Rates begin to fall
and Death Rates fall also fall and the
Population Rises rate, the number the AKA mortality of deaths in one thousand People!!!!!!!!!!!!!!!!!!!!!!! The Death Mortality
Rate! and Doubling Rate- The number of people an area can support on a sustained basis. Question of The Day In unit 2 they talked a lot about migration. Who was one of the largest groups of immigrants in the 1840s and 1850s?

A. Africans
B. Asians
D.French Unit 2: Population and Migration!!! And Alicia Reese The correct answer is C, Irish. The other largest group was the Germans. The Irish migrated to escape economic conditions and the Germans migrated because of difficult political laws. Thomas Malthus Thomas Malthus believed the population
would out grow the food supply in the future. He believed that Population grew at a doubling rate (ex. 2,4,8,16,32) while food was made at smaller rate (ex. 1,2,3,4,) Thomas Malthus Ravenstein Raventsteins laws said that most migrants traveled
short distances and if they were long range migrations
the immigrants moves to urban areas, these migrations
occured in steps, each migration produces a movement
in the opposite direction, rural dwellers are more likely
to move than urban dwellers, females are more likely to
move within their country while males are more likley
to move to different countries, adults are more likely
to move than children, most migrations are caused by
economic causes. Migration's effect on population Crude Death Rate- AKA mortality rate, the total number of deaths in a year for every
1,000 people. Infant Mortality Rate- The number of deaths in a year among infants under 1 years old for every 1,000
live births in a society. Life Expectancy- Natural Increase- REVIEW!!! Demographic Transition Model The Demographic Transition Model shows the changes
in population growth rates and the effect on population.
It is divided into 4 stages The percentage growth of a population in a year, computed by subtracting the CDR from the CBR. The average number of years an indivisual can be expected to live given social, ecomnomic, and medical conditions. Birth Rate is high as a result of:

Lack of family planning
Need for workers in agriculture
Religious beliefs
Children as economic assets
Death Rate is high because of:

High levels of disease
Lack of clean water and sanitation
Lack of health care
Competition for food from predators such as rats
Lack of education Death Rate is falling as a result of:

Improved health care (e.g. Smallpox Vaccine)
Improved Hygiene (Water for drinking boiled)
Improved sanitation
Improved food production and storage
Improved transport for food
Decreased Infant Mortality Rates
ex. Bangladesh and Nigeria Laws of Migration Family planning available
Lower Infant Mortality Rate
Increased mechanization reduces need for workers
Increased standard of living
Changing status of women This map proves Ravenstein's theory correct.
Young women are more likely to move within a
country rather than young men. Examples are China and Brazil The number of years needed
to double a population,
assuming a constant rate of
natural increase. Stage Four of the Demographic Transition
Model has low birth rates and low death rates
examples are much of Europe and in the United
Kingdom Industrial Revolution A series of improvements in indutrial technology that transformed the process of manufacturing goods. Sparked the second agricultural revolution and was during the 18th and 19th century. Carrying Capacity Overpopulation The number of people in
an area exceeds the capacity
of the environment
to support life at a decent
standard of living. Physiological Population Density- The pressure that people may place on land to produce
enough food. Its calculated by the total population/ total arable land. Push and pull factors also affect
migration. These factors include
culture, environment, and
intervening opportunities. Interregional migration is migration between different regions and Intraregional migration is migration within one region. Both of these migrations can be both forced and voluntary movements. The End They believe humanity is doomed unless it reins in population, affluence and technological change, and the associated consumption of materials, energy and chemicals and also as population and economic development increase so does the consumption of energy, land, water and other natural resources. Neo-Malthusians did not agree with
Malthus idea though.
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