Bellringer/9.1 Notes

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Bellringer/9.1 Notes
Watch the short video clip and describe the
changes that have occurred in the human
population. What do you think has caused the
recent rapid growth?
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9.1 Studying Human Populations
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1. The Human Population Over Time

1. Increased exponentially

1. Biggest increases around the time of industrial
   and scientific revolutions

1. Increased food production

1. Improvements in hygiene

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1. Forecasting Population Size

1. ____________ distribution of ages in a specific
   population at a certain time

Age Structure
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1. __________ Percentage of members of a group that
   are likely to survive to any given age.

Survivorship

1. Determined by observing a group of people born at
   the same time and noting when each member dies

1. Three types

1. Type I Most members of the population survive
   to be very old

1. Type II Population has a constant death rate at
   all ages

1. Type III The young have a greater chance of
   dying than adults

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(No Transcript)
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1. __________ Number of babies born per year per
   1,000 women

Fertility Rate
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1. _______ Movement of individuals between areas

Migration

1. Declining Death Rates Demographic Transitions

1. ____________ Avg. number of years a person is
   likely to live

Life Expectancy

1. Most affected by infant morality the death rate
   of infants less than one year old

1. Mostly affected by parents access to

1. Education
2. Food
3. Fuel
4. Clean Water

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1. ___________________ Model that describes how
   populations grow and develop

Demographic Transition

1. Broken down into four stages

1. Stage 1 Preindustrial

1. Birth rate and death rate high

1. Population size low

1. Stage 2 Transitional

1. Birth rate high, death rate falls

1. Population size grows quickly

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1. Stage 3 Industrial

1. Birth rate death rate close

1. Population size stabilizes but larger than before

1. Stage 4 Postindustrial

1. Birth rate low, death rate high

1. Population size decreases

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Demographic Transition Graph
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Bellringer/9.2 Notes
What would happen if the population of White
Plains doubled but the number of schools, roads,
stores, and houses remained the same?
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9.2 Changing Population Trends
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1. Problems of Rapid Growth

1. Many problems would surface if the human
   population grows faster than the environment can
   replace resources such as

1. Clean water
2. Burnable fuel
3. Arable land

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1. Fuel Wood, Water, and Land

1. Rapidly expanding populations use fuel wood
   faster than can be replaced by new tree growth

1. This leads to deforestation
2. Also leads to shortages of fuel wood

1. Developing countries that lack infrastructure use
   local water supplies for

1. Drinking
2. Washing
3. Sewage disposal

1. This pollutes the ground water and leads to the
   spread of disease

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1. __________ Land use to grow crops

Arable Land

1. Rapidly growing populations must decide how to
   use arable land

1. Agriculture
2. Housing
3. Natural habitats

1. __________ People moving living in cities rather
   than in rural areas

Urbanization

1. Urbanization leads to _____________

suburban sprawl

1. Growth of suburban areas outside of cities

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1. A Demographically Diverse World

1. Demographers (people who study human population)
   usually place countries into one of two
   categories

1. Developed (USA, Japan, Canada)
2. Developing (Afghanistan, Kenya, Haiti)

1. Areas with relatively stable populations

1. Europe, North America, Russia, S. Korea,
   Thailand, China, Japan, Australia, New Zealand
   (ALL DEVELOPED COURNTRIES)

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Global Growth Trends