1. Population Pyramids Waves of humanity

2. What are population pyramids?

A population pyramid shows the history of the countrys population growth.

Governments use these graphs to make predictions about the future needs of their people .

Example 1- A high growth rate will mean more schools and daycares, while a slow rate might mean fewer will be needed.

Example 2- a large elderly population will mean more nursing homes and more pharmacists to sell their medicine.

3. Parts of a pop pyramid Title Y axis- Ageof people Oldest people on top Youngest people on bottom X axis- # of people of a certain age *Men are usually on the left side, women on the right. * * 4. Types of pyramids

Rapid Growth -abroad base , indicating a high proportion ofchildren , a rapid rate of population growth, and a low proportion of older people.

It has a general shape of a triangle.

5. Types of pyramids

Slow Growth/Stablea structure withbars that even outand reflect stable or slow growth over a period. A even proportion of elderly and children that reduces in number as the people become older.

It has a general shape of a pentagon.

6. Types of pyramids

Negative Growth a high proportion ofelderly personsanddeclining numbers.

It has a general shape of a hexagon.

7. Here come the problems 8. Rapid Growth

High Birth Rate - overcrowding,shortages of resources .

High Death Rate - a young population, ashortage of working adultsto care for children. Pressure for even larger families to replace large number that die.

Low Life Expectancy - People do not live very long.Poor health and tough living conditionswill keep the country young. The real problem starts when death rate decreases

*All of this is a recipe for instability! 9. Slow Growth/Stable

Fewer problems than other pyramids, however, governments must prepare for anconstantly expanding population .

Ever larger elderly population and young population means that priorities may be divided=not enough schools or retamas.

Low Birth rate - more kids survive and grow.

Low Death rate - Kids survive to be adults.

High Life expectancy -more workers and retirees. Fewer job openings makeseducation even more important . Also, adults more productive as theirworking lives are extended .Healthcare costs go upas they age.

*Stable, but changing society. 10. Negative Growth

Theworst long term consequencesof any pyramid.

Very Low Birth Rate - Young children are less common=less schools needed.Population will shrinkas fewer babies offset the elderly who die.

Low Death Rate -excellent living conditionsand healthcare allow people live a long time.

High Life Expectancy -Elderly population becomemajority in a country . Government must boost spending on healthcare and other programs to help the older population.

We need people! - Fewer job openings= higher unemployment for younger adults. Ironically, as the pop. decline grows, there will befewer people to fill those jobs.

*Immigration needed, but some instability as the new arrivals change the culture. 11. Where they happen

Red and orange areas

Developing

countries

Rapid Growth

Why here?

Low GDP

Low Standard of living

low literacy

High Infant mortality

12. Where they happen

Some Blue/ light blueareas

Developed

countries

Slow Growth/Stable

Why here?

High GDP

High Standard of living

High literacy

Low Infant mortality

13. Where they happen

Some Blue/ light blueareas

Developed/Developing

countries

Negative Growth

Why here?

High GDP, in decline

High Standard of living, maybe in decline

High literacy

Low Infant mortality

Usually caused by political, economic, or societal decline 14. Other factors?

Personal choice and changing gender roles may play an increasing role in population growth change.