1 / 7

Population Doubling Time

Population Doubling Time. Population Doubling Time. Population Doubling Time. Definition: The amount of time for a given population to double, based on the annual growth rate .

barr
Télécharger la présentation

Population Doubling Time

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Population Doubling Time

  2. Population Doubling Time Population Doubling Time • Definition: The amount of time for a given population to double, based on the annual growth rate. • Ex.) Currently Canada’s population is Approx. 30 Million. If it grows at a constant rate of 5 Million a year it will take 6 years (30 / 5) for Canada’s population to double to 60 million. Therefore doubling time = 6 years!

  3. Rule of 70 • To determine the doubling time, divide the growth rate as a percentage into 70. i.e., a growth rate of 3.5 represents a doubling time of 20 years.

  4. Exponential Growth • Exponential growth occurs when some quantity regularly increases by a fixed percentage • In the case of a population doubling time, the population is regularly increasing by 100%.

  5. Note: rates of growth change from year to year for populations • The doubling time is only that if the rate of growth remains the same.

More Related