APHG Unit 2: The Demographic Transition Model

How many stages are there in the demographic transition model?

4-5 stages

What is a demographic transition?

a process of change in a society’s population from high crude birth and death rates and low rate of natural increase to a condition of low crude birth and death rates, low rate of natural increase, and higher total population

What are the traits of stage 1?

-Very high CBR

-Very high CDR

-NIR is at 0

What time does stage 1 take place?

At the beginning of the countries lifespan, in this period people depended on hunting and gathering for food and such.

What are the traits for stage 2?

-High CBR

-Low CDR

-NIR is increasing rapidly

What types of countries are in stage 2 of the demographic transition model?

Low developing countries

Why is the CDR decreasing in stage 2?

Antibiotics, vaccines, agriculture

What are the traits for stage 3?

-Decreasing CBR

-Decreasing, steady CDR

-NIR steadily decreasing or moderate population growth

What types of countries are in stage 3 of the demographic transition model?

Developing/High developing countries

Why does the CBR decrease in stage 3 of the demographic transition model?

Birth control, advancements in medicine and women’s freedoms

What are the traits for stage 4?

-Decreasing CBR

-Spike in CDR

-NIR eventually goes down to 0

What types of countries are in stage 4 of the demographic transitional model?

Developed countries

Why does the CDR spike in stage 4 of the demographic transition model?

An aging population

What are the traits in the possible stage 5?

-Population is decreasing

-NIR is going below 0

What types of countries are usually in stage 5 of the demographic transitional model?

Highly developed countries, countries with an older population