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Population pyramids
Question | Answer |
---|---|
What do population pyramids tell us | Population pyramids show the differences between the number of males and females as well as the number or percent of people in each category. |
Age groups | The youngest age group is 0-4 and the highest is 100+ |
Sides | The amount of women are on the right side of the pyramid and men are on the left side |
Expansive | Used to describe population pyramids young and growing and they look like a typical pyramid with a broad base and narrow top. Usually associated with developing countries |
Constrictive | Used to describe populations that are becoming old and shrinking they can look like beehives usually associated with rapidly developed countries. |
Stationary | Used to describe populations that are not growing an have equal percentages across the age groups narrow towards the top and usually associated with developed countries |
Birth rate | How many babys are born |
Death rates | How many deaths |
Demographic transition model stage 1 | High fluctuating A poorly economically developed. The birth and death rates are both very high countries may be experiencing war, famine and diseases population can grow very slowly example Somalia. |
Stage 2 | The economy is starting to grow. Birth rates remain high the death rates now begin to fall because of better food, medical care and supply of clean water. Population now grows very quickly there is a natral decrease example Nigeria |
Stage 3 | The economy is continuing to grow. People begin to plan the size of their families so the birth rates fall. The rate of population growth slows down example India |
Stage 4 | The economy is now considered developed. Most people are living long lives, but they are having fewer children. Both the birth death rates rates are now low. Population now fluctuates and only increases very slowly. Example Ireland |
Stage 5 | The economy is very well developed. Women are having very few children and most people are living into old stage. The population is now in decline- there is a natural decrease example Germany |
Examples | Stage 1: Somalia Stage 2: Nigeria Stage 3: India Stage 4: Ireland Stage 5: Germany |