World in Balance. Population Pyramid Distribution Types Expanding Stationary Contracting.
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Transcript of World in Balance. Population Pyramid Distribution Types Expanding Stationary Contracting.
Stationary Pyramid
• A population pyramid typical of countries with low fertility and low mortality, also called a constrictive pyramid
Expansive Pyramid
• Shows a broad base, indicating high proportion of children, a rapid rate of population growth, and a low proportion of older people
• Steady upwards narrowing shows that more people die at each higher age band– High birth rate & high death rate – short life expectancy– Typical for less economically developed countries, due
to little access to and incentive to use birth control, negative environmental factors (such as clean water) and poor access to health care
Constrictive pyramid
• A population pyramid showing lower numbers or percentages of younger people.
• The country will have a greying population which means that people are generally older