1) What does the map show?2) Why is this useful?

3) What types of countries have a youthful population?

Population Structure

LEARNING OBJECTIVES1. Be able to annotate population pyramids2. Distinguish between the population structure of an MEDC

and an LEDC

Keywords:

• Census:• Demography:• Population pyramid:• Sex-ratio:• Age distribution:• Dependent Population:• Economically Active:

http://populationpyramid.net/WORLD/2015/

• Demography is the study of people and populations.

• Governments carry out a census to find out who lives in their country.

• They use the information to produce population structures• However, they are taken at different times in different countries and often

country boundaries change so it is difficult for a census to be accurate.Some countries can not afford to do a census and people do not always fill in the forms so the population of the world can only be an estimate.

• Demographers use census information to create population pyramids

What do they show?

• Sex-ratio: the amount of males to females in a location

Males are shown on the left.

Females are shown on the right.

What do they show?

Age distribution of a country

Age categories split into 5 year stages

• Dependent Population: The population under the age of 15 and over 65

What do they show?

Children 0-14 years of age

Elderly population 65+ years of age

• Economically Active: 15-60 years old who have the potential to contribute economically

What do they show?

Workforce

What do they show?

In this country

there is a high Birth

Rate

There is also a high

Death Rate.

What should you annotate?

Sex-ratio: what is the male/female

ratio

Birth Rate: Is the BR increasing or decreasing

What do population pyramids look like for different stages of the DTM?

Stage 5?

Complete Complete sheetsheet

Dependency Ratio

• The dependency ratio can be expressed as:

Population( u14 + 65+) X 100

Population 15-65

• Which population pyramid is for Germany, Kenya (LEDC) and USA (MEDC)?