WORLD POPULATIONChapter 4 Section 1

Population Growth

6.2 billion people live on the earth. People live on 30% of the planets

land. By 2025 the population should be

around 7.8 billion. Do you think that the population has

always increased so rapidly?

Growth Rates

Death rate- number of deaths per year for every 1000 people

Birthrate- number of births per year for every 1000 people

Doubling time- number of years it takes a population to double in size

Zero population growth- birthrate and death rate are equal

Natural increase- the growth rate of a population; the difference between birthrate and death rate.

Challenges of Population Growth Why is over population bad?-Food (especially in poor countries)- Resources- waste resources faster

(oil, housing, water)

- Can over population by good?-More technology

Population

Negative population growth- In Germany and Hungary

Population Distribution- Pattern of human settlement. (uneven)

Population Density- average number of people living on a square mile of land.

Migration- the movement of people from place to place