AP Environmental Science Flashcards: Human Population Dynamics

What this deck covers

This deck focuses on Human Population Dynamics, giving you a quick way to review the definitions, rules, and examples that matter most for AP Environmental Science.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Flashcard 1: Identify the formula for population growth rate.

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

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

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

Flashcard 3: Which option describes 'age structure diagram'?

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

Flashcard 4: State the formula for crude birth rate (CBR).

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

Flashcard 5: What is the definition of 'infant mortality rate'?

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

Flashcard 6: What is the primary driver of population growth in developing countries?

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

Flashcard 7: What is 'total fertility rate' (TFR)?

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

Flashcard 8: What is a common cause of urban sprawl?

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

Flashcard 9: How does emigration affect population size?

Answer: Decreases population size. Removes individuals from the existing population.

Flashcard 10: What is the current estimated world population (2023)?

Answer: Approximately 8 billion. Reached this milestone in late 2022.

Flashcard 11: Calculate the population growth rate: Births=100, Deaths=50, Population=1000.

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

Flashcard 12: Identify one consequence of overpopulation.

Answer: Resource depletion. Results from exceeding environmental carrying capacity.

Flashcard 13: What is one consequence of an aging population?

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

Flashcard 14: Identify one characteristic of a post-industrial society.

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

Flashcard 15: Calculate the crude death rate: Deaths=30, Population=3000.

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

Flashcard 16: Identify one impact of high population density.

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

Flashcard 17: What is the definition of 'urban sprawl'?

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

Flashcard 18: What is the definition of 'infant mortality rate'?

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

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

Answer: Natural disasters. Affects populations regardless of their density levels.

Flashcard 20: What is the primary driver of population growth in developing countries?

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

Flashcard 21: How are birth and death rates expressed?

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

Flashcard 22: State the formula for crude death rate (CDR).

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

Flashcard 23: What is the definition of 'population density'?

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

Flashcard 24: State the formula for doubling time using the Rule of 70.

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

Flashcard 25: What is 'total fertility rate' (TFR)?

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

Flashcard 26: What is the current estimated world population (2023)?

Answer: Approximately 8 billion. Reached this milestone in late 2022.

Flashcard 27: What is one effect of reduced fertility rates?

Answer: Population aging. Fewer births create disproportionately older population structure.

Flashcard 28: Identify the main cause of urbanization.

Answer: Industrialization. Creates jobs and economic opportunities in cities.

Flashcard 29: What is the definition of 'net migration rate'?

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

Flashcard 30: What does a 'pyramid-shaped' age structure indicate?

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

Flashcard 31: What is the definition of 'urban sprawl'?

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

Flashcard 32: Identify an example of a density-independent factor.

Answer: Natural disasters. Affects populations regardless of their density levels.

Flashcard 33: What is the definition of 'net migration rate'?

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

Flashcard 34: What is the replacement-level fertility rate in developed countries?

Answer: Approximately 2.1. Accounts for infant mortality and demographic factors.

Flashcard 35: What is the definition of carrying capacity?

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

Flashcard 36: Identify one factor that influences life expectancy.

Answer: Healthcare access. Medical care quality directly affects survival rates.

Flashcard 37: State the formula for doubling time using the Rule of 70.

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

Flashcard 38: State the formula for crude birth rate (CBR).

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

Flashcard 39: Which factor is NOT part of demographic transition?

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

Flashcard 40: Identify one factor that influences life expectancy.

Answer: Healthcare access. Medical care quality directly affects survival rates.

Flashcard 41: How does immigration affect population size?

Answer: Increases population size. Adds individuals to the existing population.

Flashcard 42: What is one effect of reduced fertility rates?

Answer: Population aging. Fewer births create disproportionately older population structure.

Flashcard 43: What is an example of a density-dependent factor?

Answer: Disease. Effects intensify as population density increases.

Flashcard 44: Which factor is NOT part of demographic transition?

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

Flashcard 45: Identify one environmental impact of urbanization.

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

Flashcard 46: Calculate the crude birth rate: Births=50, Population=2000.

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

Flashcard 47: What does a 'column-shaped' age structure indicate?

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

Flashcard 48: Identify one environmental impact of urbanization.

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

Flashcard 49: What is the replacement-level fertility rate in developed countries?

Answer: Approximately 2.1. Accounts for infant mortality and demographic factors.

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

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

Flashcard 51: What is the significance of a high infant mortality rate?

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

Flashcard 52: What does a 'column-shaped' age structure indicate?

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

Flashcard 53: Find the birth rate: Births=20, Population=1000.

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

Flashcard 54: What is the definition of 'replacement-level fertility'?

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

Flashcard 55: How are birth and death rates expressed?

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

Flashcard 56: Identify one consequence of overpopulation.

Answer: Resource depletion. Results from exceeding environmental carrying capacity.

Flashcard 57: Identify one impact of high population density.

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

Flashcard 58: What is the definition of 'population density'?

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

Flashcard 59: What is the definition of carrying capacity?

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

Flashcard 60: What does a 'pyramid-shaped' age structure indicate?

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

Flashcard 61: What is the definition of 'replacement-level fertility'?

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

Flashcard 62: Identify the main cause of urbanization.

Answer: Industrialization. Creates jobs and economic opportunities in cities.

Flashcard 63: Find the doubling time for a population with a 2% growth rate.

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

Flashcard 64: What is the significance of a high infant mortality rate?

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

Flashcard 65: Which option describes 'age structure diagram'?

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

Flashcard 66: Find the birth rate: Births=20, Population=1000.

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

Flashcard 67: What does the term 'demographic transition' describe?

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

Flashcard 68: What is an example of a density-dependent factor?

Answer: Disease. Effects intensify as population density increases.

Flashcard 69: Identify one characteristic of a post-industrial society.

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

Flashcard 70: What is one consequence of an aging population?

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

Flashcard 71: State the formula for crude death rate (CDR).

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

Flashcard 72: Calculate the population growth rate: Births=100, Deaths=50, Population=1000.

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

Flashcard 73: What is a common cause of urban sprawl?

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