Unit 2: Population Pyramids Flashcards
What is sex ratio?
male births/female births x 100
What does a sex ratio above 100 mean?
more male births in a society
What does a sex ratio less than 100 mean?
more female births in a society
What does a sex ratio mean if it is exactly 100?
equal female and male births
Which sex dies sooner?
Men
If the population is clustered in the pre reproductive, and reproductive years, what can we assume?
-the population will grow at a much faster rate
-developing country
If the population is clustered in their reproductive and post reproductive years, what can we assume?
-population will grow at a slower rate
-country is more developed
What is the dependency ratio?
number of children + number of adults/working age population x 100
What does a higher dependency ratio mean?
a burden on the working class
What is the child dependency ratio?
children/working class (15-64) x 100
What is the elderly dependency ratio?
number of elders (65+) / working age x 100
