http://www.flickr.com/photos/gadgetgirl70/201696636/

The number of people living in an area.

Birth Rate- number of births per 1000 of the

population.

Death Rate- number of deaths per 1000 of the

population.

Emigration- number of people leaving the

country.

Immigration- number of people entering the

country.

Birth rate- death rate = natural increase.

http://en.wikipedia.org/wiki/File:Population_curve.svg

http://biol1114.okstate.edu/study_guides/scenarios/7-diseases/diseases.html

http://en.wikipedia.org/wiki/File:Countriesbyfertilityrate.svg

Higher the number of children per family.

7-8 children per family.