How to predict when a population will double in size
In short: Understand the mathematical shortcut used to estimate growth. This video from Khan Academy explains the Rule of 70, a practical tool for calculating how long it takes for a population to double based on its current growth rate.
The Rule of 70 is a simplified method used in environmental science and economics to approximate doubling time. By dividing the number 70 by a population's percentage growth rate, you can quickly estimate the number of years required for that population to twice its current size.
This concept serves as a fundamental skill for students in AP Environmental Science, helping them grasp the implications of exponential growth and the speed at which biological or human populations can expand.
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Sources
- Summary by Intellect · source: Rule of 70 to approximate population doubling time | AP Environmental Science | Khan Academy
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