World Population Growth: A 20th Century Explosion

Global Studies 9 - Damon

Terms to Know

• Demographic: relating to population

• Crude Birth Rate (CBR): live births per 1000 people per year

• Crude Death Rate (CDR): deaths per 1000 people per year

• Rate of Natural Increase (RNI): births - deaths per 1000 people per year

What Has Happened in Most Developed Countries That Has

Not Happened in Many Developing Countries?

The Demographic Transition

The Classic Stages of Demographic Transition

The Classic Stages of Demographic Transition

Stage 1 Stage 2 Stage 3 Stage 4

Naturalincrease

The Classic Stages of Demographic Transition

Stage 1 Stage 2 Stage 3 Stage 4

Time

Birth rate

Death rate

The Classic Stages of Demographic Transition

Time

Stage 1 Stage 2 Stage 3 Stage 4

Naturalincrease

Birth rate

Death rate

Note: Natural increase is produced from the excess of births over deaths.

What Causes Death and Birth Rates to Fall?

• Death Rates fall with improvements in:– Health care– Hygiene– Sanitation– Food supply

What Causes Death and Birth Rates to Fall?

• Death Rates fall with improvements in:– Health care– Hygiene– Sanitation– Food supply

• Birth Rates fall with:– Birth control (available and affordable)– Education, esp. of women– Industrialization– Economic opportunity– Increased standard of living

Correlation to Population Pyramids

Correlation to Population Pyramids

Stage 1

Stage 2

Stage 3

Stage 4

No modern countries remain in Stage 1

What Stage of the Demographic Transition Are These Countries In?