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STUDYING POPULATION - Coggle Diagram
STUDYING POPULATION
The growth of world population
Population growth has not always been the same:
From the 19 century,world
population increased.
In the 20 century,world
population explosion.
World population
grew very slowly before the 19
century because death rates were high.
Today,the world´s population is
7.8 billion.
By 2050,it is expected to reach
9.7 billion
Recent demographic trends
Current demographic trends are as follows:
The
fertitity rate
has also fallen:
There was a rate os 5 children per woman in 1950,compared to 2.5 nowadays
In developed countries,the rate fell from 3 to 1.6 children per woman.
There has been a decline in the
death rate
in most regions.
The
birth rate
has fallen throughout the world.
Life expectancy
has risen because of advances in medicine,nutricion and hygiene:
In 1950,average life expectancy was 46.7 years for men and 48.7 for women.
In 2018,it was 70.2 for men and 74.7 for women.
Uneven growth
The rate of natural increase varies grease varies greatly from one region to another:
Developed countries:
The
death rate is low.
The
fertility rate is low
The
birth rate
is
very low
at 10.5 per thousand(10.5%)
Life expectancy
is
high
The
rate of natural increse is very low,
around 0.2%
There is an
ageing population
Less developed countries
The
death rate
has fallen
The
fertility rate is high
The
birth rate is very high
,at 31.6%
Life expectancy
is
low
.
There
rate of natural increase in high
,between 2% and 3%
There is a
young population