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Chapter 13
Studying Human Populations
Question | Answer |
---|---|
Demography | the study of human populations |
Demographic transition | a model of the changes in a region's population as it industrializes, it takes from one to three generations to cycle in most developed countries |
Infrastructure | basic facilities and services that support a community |
Least Developed Countries | countries that show few signs of development that have increasing death rates, and birth rates remain high |
Age Structure | the distribution of ages in a specific population at a given time |
Survivorship | The percentage of members of a group that are likely to survive to any given age |
Infant Mortality | the rate at which infants die |
Life Expectancy | the average age people of a given area live to |
Death Rate | the number of deaths each year |
Fertility Rate | the number of babies born per year per 1,000 women |
Urbanization | more people living in cities than rural areas |
Migration | the movement of people between areas |
Immigration | the movement of people into an area |
emigration | the movement of people out of an area |
Demographic Transition Stage I | pre-industrial condition: birth rate and death rate high, population is stable (Low Growth Rate) |
Demographic transition II | Population Explosion: death rates decline and birth rates increase as living conditions improve, population could double (Very High Growth Rate) |
Demographic Transition III | Population growth slows because birthrate decreases, birth rate and death rate become closer together. population stabilizes but population remains high (Low Growth Rate) |
Demographic Transition IV | Birth rate drops below replacement level so population begins to decrease (Zero Growth Rate) |
72 years | the number of years it takes for the human population to double at 1% |
36 years | the number of years it takes for a population to grow at 2% |
Type I Survivorship | people live to be very old |
Type II Survivorship | population has similar death rate at all ages |
Type III | poor human populations where many children die |
What was the worldwide average life expectancy in 2000? | more than 67 years |
What was the worldwide life expectancy in 1900? | about 40 years |
What is the life expectancy for people in many developed countries? | almost 80 years |
What do most infants need in order to survive | to be fed well and kept clean and warm |
What factor most likely causes a low life expectance for a country? | diminished food supply |
Which factors might have the greatest effect on infant mortality in a country? | parents access to education, food, fuel, and clean water |
What is the main source of fuel for many poor countries? | wood |
When do people use fallen tree limbs for fuel? | when the population is stable |
When do people begin to cut down trees for fuelwood? | When population grows quickly |
Why is public water in some parts of the world unsafe to drink? | there are parasites and other diseases in the water |
Deadwood | trees that are already dead or fallen |
Stage I of "shortage of Fuelwood" | a stable population that was using deadwood starts to grow rapidly |
Stage II "shortage of Fuelwood" | the deadwood does not accumulate fast enough to provide the population with enough fuel |
Stage III "shortage of Fuelwood" | the growing population begins to cut down living trees for fuel |
Stage IV "shortage of Fuelwood" | The area in which a population lives may become cleared of vegetation |
Stage V "shortage of Fuelwood" | the amount of available wood decreases |
What purpose does fuelwood serve? | a way to boil water and cook food |
What is the result of an inadequate supply of fuelwood? | many people can suffer disease and malnutrition |
What are some reasons that Fertility rates can change? | culture, laws, personal choice, or the availability of healthcare |
How are human populations different from wildlife? | Humans are widespread throughout the world, migrate more often over greater areas, and they exploit and manipulate their environment using technology and tools |