AP Huge Unit 2

Arithmetic Density

The total density

Arithmetic formula

People/land=A

Physiological Density

Amount of people in arable land, carrying capacity

Physiological Formula

People/arable=P

Agricultural Density

Amount of farmers per arable land, development

Agricultural Formula

Farmers/arable=A

Doubling time

70/NIR- How many years it will take to double the population

Natural Increase Rate-NIR

CBR-CDR/10- How fast country is growing in the moment

Replacement Rate

2.1

Crude Birth Rate- CBR

Total number or live births in a year for every 1000 people alive in the whole world

Crude Death Rate- CDR

Total number of deaths in a year for every 1000 people in the world

Total fertility rate- TFR

Average amount of children a woman will have during her child bearing years, for world is 2.2

Infant Mortality Rate- IMR

Annual number of deaths of infants under one year of age compared to total births

Malthus theory

Population is growing faster than the food food supply

Neo-Malthusian theory

Population is growing faster that all goods

Stage 1

No population pyramid, birth and death rates are high because of need for labor and poor medical knowledge

Stage 1 ETM

Infection

Stage 2

Triangular pyramid, births stay high and death starts to drop because still need for labor but some education on infection

Stage 2 ETM

Receding Pandemics

Stage 3

House shaped pyramid, birth and death rates go down because not as much labor needed and even more education of illness

Stage 3 ETM

Degenerative Disease

Stage 4

Cylindrical pyramid, birth and death continue to drop because even more research and choosing to have kids or have less kids

Stage 4 ETM

Delayed degenerative disease