Human population growth models, demographic transition, and carrying capacity concepts tested on AP Environmental Science.
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- What type of population growth occurs when resources are unlimited and the population increases by a constant percentage each time period?
- Exponential growth
- What type of population growth slows as the population approaches the carrying capacity of the environment?
- Logistic growth
- What is carrying capacity?
- The maximum population size that an environment can sustain indefinitely
- What does a J-shaped population curve indicate?
- Unlimited exponential growth with no environmental resistance
- What does an S-shaped population curve indicate?
- Logistic growth that levels off as it reaches carrying capacity
- What is the demographic transition model?
- A model describing how populations shift from high birth and death rates to low birth and death rates as a society develops
- What characterizes Stage 1 of the demographic transition model?
- High birth rates and high death rates, resulting in low population growth
- What characterizes Stage 2 of the demographic transition model?
- High birth rates but declining death rates, resulting in rapid population growth
- What characterizes Stage 3 of the demographic transition model?
- Declining birth rates and low death rates, resulting in slowing population growth
- What characterizes Stage 4 of the demographic transition model?
- Low birth rates and low death rates, resulting in stable or very slow population growth
- What is birth rate?
- The number of live births per 1,000 people in a population per year
- What is death rate?
- The number of deaths per 1,000 people in a population per year
- How is the natural increase rate calculated?
- Birth rate minus death rate
- What is population doubling time?
- The number of years it takes for a population to double in size
- According to the Rule of 70, how do you estimate population doubling time?
- Divide 70 by the annual growth rate percentage