Human Population Dynamics - AP Environmental Science

1. Identify the formula for population growth rate.

   Population Growth Rate = (Births - Deaths) / Total Population × 100. Net change expressed as percentage of total population.

2. State the formula for crude birth rate (CBR).

   CBR = (Number of Births / Total Population) × 1,000. Standard formula for measuring births per population.

3. What is the definition of 'infant mortality rate'?

   Number of infant deaths per 1,000 live births. Key indicator of healthcare quality and development.

4. What is the primary driver of population growth in developing countries?

   High birth rates. Exceeds death rates, creating natural population increase.

5. What is 'total fertility rate' (TFR)?

   The average number of children a woman will have in her lifetime. Key indicator of reproductive patterns and demographics.

6. What is a common cause of urban sprawl?

   Increased automobile use. Car-dependent development spreads cities outward unnecessarily.

7. How does emigration affect population size?

   Decreases population size. Removes individuals from the existing population.

8. Identify one consequence of overpopulation.

   Resource depletion. Results from exceeding environmental carrying capacity.

9. Calculate the crude death rate: Deaths=30, Population=3000.

   10 deaths per 1,000 individuals. $(30 ÷ 3000) × 1000 = 10$ per 1,000.

10. Identify one impact of high population density.

    Increased competition for resources. Limited space intensifies competition for basic needs.

11. What is the definition of 'population density'?

    Number of individuals per unit area or volume. Measures crowding and resource competition intensity.

12. State the formula for doubling time using the Rule of 70.

    Doubling Time (years) = 70 / Growth Rate (%). Estimates time for population to double at constant growth rate.

13. What is the current estimated world population (2023)?

    Approximately 8 billion. Reached this milestone in late 2022.

14. What is one effect of reduced fertility rates?

    Population aging. Fewer births create disproportionately older population structure.

15. Identify the main cause of urbanization.

    Industrialization. Creates jobs and economic opportunities in cities.

16. What is the definition of 'net migration rate'?

    The difference between immigration and emigration per 1,000 individuals. Measures net population change from migration patterns.

17. What does a 'pyramid-shaped' age structure indicate?

    Rapid population growth. Large base shows many young, reproductive individuals.

18. What is the definition of 'urban sprawl'?

    The uncontrolled expansion of urban areas. Low-density development consumes excessive land resources.

19. Identify an example of a density-independent factor.

    Natural disasters. Affects populations regardless of their density levels.

20. Identify one factor that influences life expectancy.

    Healthcare access. Medical care quality directly affects survival rates.

21. How does immigration affect population size?

    Increases population size. Adds individuals to the existing population.

22. Which factor is NOT part of demographic transition?

    Genetic mutation. Demographic factors focus on births, deaths, and migration patterns.

23. Identify one environmental impact of urbanization.

    Loss of natural habitats. City expansion destroys ecosystems and wildlife areas.

24. What is the replacement-level fertility rate in developed countries?

    Approximately 2.1. Accounts for infant mortality and demographic factors.

25. Calculate the crude birth rate: Births=50, Population=2000.

    25 births per 1,000 individuals. $(50 ÷ 2000) × 1000 = 25$ per 1,000.

26. What is the significance of a high infant mortality rate?

    Indicator of poor health conditions. Reflects inadequate prenatal and infant healthcare systems.

27. What does a 'column-shaped' age structure indicate?

    Stable population. Equal birth and death rates maintain constant size.

28. How are birth and death rates expressed?

    Per 1,000 individuals per year. Standard demographic measurement for comparison purposes.

29. What is the definition of carrying capacity?

    The maximum population size an environment can sustain indefinitely. Determined by available resources and environmental limits.

30. What is the definition of 'replacement-level fertility'?

    The average number of children a couple must have to replace themselves. Maintains stable population size over generations.

31. Find the doubling time for a population with a 2% growth rate.

    35 years. Using Rule of 70: $70 ÷ 2\% = 35$ years.

32. Which option describes 'age structure diagram'?

    A graphical illustration of the age distribution within a population. Shows population structure by age and gender groups.

33. Find the birth rate: Births=20, Population=1000.

    20 births per 1,000 individuals. $20 ÷ 1000 × 1000 = 20$ per 1,000.

34. What does the term 'demographic transition' describe?

    The shift from high birth and death rates to low birth and death rates. Occurs as societies develop economically and socially.

35. What is an example of a density-dependent factor?

    Disease. Effects intensify as population density increases.

36. Identify one characteristic of a post-industrial society.

    Low birth and death rates. Indicates completed demographic transition stage.

37. What is one consequence of an aging population?

    Increased healthcare costs. Larger elderly population requires more medical services.

38. State the formula for crude death rate (CDR).

    CDR = (Number of Deaths / Total Population) × 1,000. Standard formula for measuring deaths per population.

39. Calculate the population growth rate: Births=100, Deaths=50, Population=1000.

    5%. $(100 - 50) ÷ 1000 × 100 = 5\%$.

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