Summarize the five population growth patterns schematic interpretation?
The first, expansionary, is wide at the bottom and narrow at the top. It is in the shape of a true pyramid. This type indicates a large proportion of the population of children and adolescents and a small proportion of the elderly population, and is the result of a long period of high birth rate and natural growth rate of the population. This type of population is growing due to the high proportion of people of childbearing age. If the fertility level is not lowered, its future trend in population reproduction will be one of rapid growth and constant expansion. The second type, the stationary type, has a roughly equalized proportion of the population in all age groups and resembles the shape of a tower at the top of a mosque. This type is one in which the birth rate is about the same as the death rate, and its future trend in population reproduction is steady growth around zero. If the birth rate speaks a step down, there is a transition to the third type. The third type, the contraction type, the pyramid has been deformed as the bottom shrinks and the top widens. This type indicates a shrinking share of the population of children and adolescents and an increase in the share of the elderly population, as a result of a long-term decline in the birth rate. This type of population, with its low proportion of people of childbearing age and an even lower reserve, has a negative trend towards future population reproduction and a shrinking population if fertility levels remain unchanged.
There are three main patterns of population growth
There are three main patterns of population growth as follows:
1. Primitive (high high low): high birth rate, high death rate, low natural growth rate. Mainly distributed in primitive societies and individual areas of individual countries in present Africa.
2. Traditional (High-Low-High): High birth rate, low death rate, high natural growth rate. Mainly in agricultural societies and most developing countries.
3. Modern type (low-low-low): the birth rate begins to decline significantly, and the death rate continues to decline and reaches a low level. As the gap between the two gradually decreases, the natural growth rate gradually decreases, and some developed countries even began to experience negative or zero growth. Mainly distributed in most developed countries, Russia.
What are the population growth patterns
There are three main population growth patterns.
I. Primitive (also known as: high high low pattern)
Basic characteristics: high birth rate, high death rate, low natural growth rate.
Scope of distribution: primitive society and individual areas of individual countries in modern Africa.
Causes: Primitive societies and these individual regions, mainly due to the limitations of the natural environment, showing a primitive pattern of population growth. Generally, the natural environment is superior to the region of high natural growth rate, the environment of the region of poor natural growth rate is low.
Traditional (also known as: high-low-high model)
Basic characteristics: high birth rate, low death rate, high natural growth rate.
Scope of distribution: agrarian societies and most developing countries, but excluding Russia.
Causes: The increase in the social workforce and social wealth, which promotes the development of society, as well as urbanization, which leads to an increase in the birth rate and a decrease in the death rate, ultimately leading to a high rate of natural increase.
Third, the modern type (also known as: low-low-low model)
Basic characteristics: low birth rate, low death rate, low natural growth rate.
Distribution: most developed countries, as well as Russia.
Causes of formation: As society breaks through further on the basis of modern times, the birth rate begins to decline significantly, and the death rate continues to decline and reaches a low level. This led to a gradual decrease in the gap between the birth rate and the death rate, and ultimately a gradual decrease in the natural growth rate, and even some developed countries even began to experience negative or zero population growth.
What are the three forms of demographic charts?
The common demographic charts are:
xiPlease click to enter a picture description
I hope this helps.
The figure below shows the world’s population growth pattern in four stages. Read the graph to complete the following questions. Subtitle 1:According to the graph, the evolutionary order of population growth patterns is generally
Test Question Analysis:
Subtitle 1:Over time, the world’s population growth pattern will change from a “high-low” pattern to a “high-low-high” pattern, and then to a “low-low-high” pattern. high – low” pattern to a “high – low – high” pattern, and then to a “low – low” pattern. The pattern of world population growth will change from a “high-high-low” pattern to a “high-low-high” pattern and then to a “low-low-low” pattern. Stage D in the figure has the highest birth rate, but the natural growth rate of the population is low, indicating that it has a high mortality rate and a “high – high – low” pattern of population growth; Stage C has a very low birth rate and natural growth rate, and a “low – low – low” pattern of population growth; Stage C has a very low birth rate and natural growth rate, and a “low – low – low” pattern of population growth. Stage C has a very low birth rate and natural increase rate, and the pattern of population growth is “low-low-low”; Stage B has a lower birth rate and natural increase rate than Stage A, so Stage B is located after Stage A.
Subtitle 2:Stage A has the highest natural population growth rate, indicating that the population is growing fastest at this time, but the number has not reached the maximum; the environmental population capacity is most affected by the resources, the level of scientific and technological development, and the level of people’s life and cultural consumption, which is not very relevant to the population size; Stage C, due to the increase in the elderly population, the population mortality rate may rise; Stage D, although the natural population growth rate is very low, but due to the high birth rate and death rate, the problem of population aging is not prominent, and the burden of social pension is not heavy.