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Chapter 24: Human Impacts, Biodiversity, and Environmental Issues
Age Structure and Population Growth
Age Structure and Population Growth
This activity contains 5 questions.
Which of the following statements about the age structure of populations is correct?
The age structure in developing countries is bottom heavy, indicating that these populations are dominated by postreproductive individuals.
Populations in more developed countries grow more quickly than populations in less developed countries.
The number of individuals in the prereproductive age group is a good indicator of the future size of the population.
The age structure in stable countries such as the United States shows an hourglass pattern, with the greatest numbers of people being either of prereproductive or postreproductive age.
True or false. Even if two women have the same number of children, the woman who delays childbirth will have less of an impact on population growth.
true
false
How can the change in the size of a population over time be determined?
Add the number of individuals who immigrate to the numbers of individuals who are born within the population and then subtract the number of emigrants.
Add the numbers of individuals who are born or immigrate into the population and subtract the numbers of individuals who die or emigrate.
Subtract the number of individuals who emigrate from the numbers of individuals who are born within the population.
Add the number of individuals who immigrate into the population to the number of individuals born, and subtract the number of individuals who die.
In a hypothetical world population, calculate the net growth given the following statistics: Births, 25 per 1000; deaths, 10 per 1000; immigration 10 per 1000; emigration, 5 per 1000.
1.5%
2%
1%
0% (no net gain)
Why will Canada's population probably decrease over time (in the future)?
Canada has a relatively low population and a low immigration rate.
Canada is an industrialized nation, and industrialized nations generally have lower birth rates than undeveloped countries do. Therefore the population will probably decrease in the future.
Canada's population will probably decrease over time because Canada's prereproductive population base is smaller than its reproductive population base.
Assuming the birth and death and immigration and emigration rates remain constant, Canada's population will not decrease. However, because Canada is an industrialized nation, growth rate will be slower than in many nations.
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