PopulationReview & New (p. 322)

Today: Demographic RevolutionDemographic Transition Model

Age Structure

Review• What is Demography / Demographics?– The study of human population– “DEMO” Demonstrate (show/act = humans are the only

thing that DEMONSTRATES)– “GRAPHY” Geography / Biography – Study of…

• What is “Life Expectancy”?– How long do humans expect to have life for…– How long are humans are living in a population group

(area/type of people)• How has life expectancy changed since 1800 to 2012?– Longer life is the change (Developed world especially..live

longer!!)– Medicines, technology/productivity, nutrition, safer

environments

Demographic Revolution (p 322)

• Revolution: a big change, usually positive change)

• The big Change in human population IS: We are now living longer!

• Life expectancy increased!– BECAUSE: Medicines, technology, productivity,

environment, etc.

Demographic Transition Model(p. 324)

• Demographic – Characteristics of human population

• Transition – CHANGE (The process of change)• Model – Visual Data (Graph)

Details of: Demographic Transition Model

• Geographers use Models to: to let people understand a theory/reality. To show information

• A Demographic Transition Model shows: Birth Rate/Death Rate & Overall Population Trends– Shows Trend as country evolves from Developing to

Developed• The assumptions this model makes are:– Transition from Stage 1 - High Birth/Death rates will

DECREASE• What affects Birth rate & Death Rate– Health Care/Economy/ INDUSTRIALIZATION of a Country

(As it becomes modern)

Stage 1 – What does it show us

SURFACE MEANING• High Birth Rate & High Death RateRESULT: Small population growth

Deeper Meaning:Why is this happening here?

- Disease, lack of medicine, low living standardsWHERE is this happening?

- Poor DEVELOPING Countries

Stage 2 – Great Example of TRANSITION!

Surface Meaning (What we see?)- Death rate DECREASES (change from stage 1)- Birth Rate Remains High, (did not change from

stage 1)RESULT: Population Growth is…INCREASE!WHY is this happening?:

- Decrease in death rate (end of war…development of: technology, medicine, living standards)

Birth Rates – People still love….makin babies!

Stage 3• What do we see?Death Rate: Remains Same (Very low)Birth Rate: Decreases (higher than death rate)RESULT to Population Growth?: Population is

increasing a little

Why Birth Rate Decrease:- Don’t like making babies!!

Industrialization, urbanization, improved standards-- More options to spend your money on stuff!

Homework

• P. 324 (Q # 2)• Read P. 325 – 328– (P. 328) - Q# 1 ,2