Warm - Up

Miniature Earth – If the population of the Earth were shrunk to just 100 people, but the proportions were kept the same, how many would speak English? How many would be Muslim? How many would have internet? How many people cannot read? This video will show us.

http://www.schooltube.com/video/a6df161afdd345dab931/Miniature-Earth

POPULATION

Demography-study of population

Census- survey of population, done every 10 years by the federal government

Population Density

What is over population?number of people exceeds available resources

Population Growth Over Time “The J Curve”

During the Industrial RevolutionLate 1700’s to 1900’sNew technologies improved medicine, sanitation, and food production.

What are Birth Rates?Birth Rate – number of live births per 1000 people

Fertility Rate – average number of children a woman will have in her lifetime

What are Death Rates?Death (Mortality) Rate – number of deaths per 1000 people

Infant Mortality Rate – number of deaths among infants under 1 year old, per 1000 live births

What is Rate of Natural Increase?Rate of Natural Increase- % a population grows in one year

Birth Rate minus Death Rate

=

Rate of Natural Increase

POPULATION PYRAMIDS

Complex Bar Graph

What is shown?• Males and Females by age

Why?Demographers use age and sex to help predict info. about a country

How do population pyramids work?Wide base = high % of childrenNarrow base = low % of children

What is a Population Pyramid?

Making Predictions

Look at the shape of these charts, and think about them. Then try to answer these questions on a separate paper.

Which has a higher % of children?

Which is most wealthy, most poor?

Which has the most unemployed?

Which probably has best health care?

Which has most not going to school?