Topic One Resources
Comparing Lifespan and Life Expectancy
Below you see an image of life expectancy. How does life expectancy compare with the text definition of lifespan?
Lifespan, or longevity, refers to the length of time a species can exist under the most optimal conditions.
Life expectancy is the predicted number of years a person born in a particular time period can reasonably expect to live.
Refer to page 12 of your text.
