population concentration

On Friday in Human Geo, we talked about population concentration, populated areas, population density, and components on population. I learned that 2/3 o f the world's inhabitants are focused in 4 regions: East Asia, South Asia, Southeast Asia, and Europe. Population clusters typically have flat areas with fertile soil, temperate climates, and are located near a body of water. Places that are sparsely populated are because of dry, wet, cold, and high areas. These areas usually have less people because they are considered "too harsh" for living. In class we also learned that population density is computed in 3 different ways: Arithmetic, Physiological, and Agricultural.

• Arithmetic Density is computed by dividing population by land area
• Physiological Density is computed by dividing population by farmable land
• Agricultural Density is computed by dividing population of farmers by farmable land

The final thing we talked about in class were the components of population. Geographers measure population change in a country or the world by using crude birth rate, death rate, and the rate of natural increase.