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Every second five people are born and two people die.
That is a gain of three people per second!
The world population is the total number of humans alive on the planet Earth at a given time. What is the current world population? In which continent do most people live?
How popular? A country’s population refers to the total number of people that are living there. China is the most populated country in the world. There are over 1.3 billion people living there. With a population of just over 11,000 , Tuvalu is one of the least populated countries in the world. What do you think the population of Singapore is?
The only way is up This population explosion has been caused by a number of different factors.
Developing countries have higher birth rates .
Death rates have fallen in well-developed countries due to advances in medical science.
The number of countries that are economically sound and well-developed has risen over the past 100 years.
How might these different factors have affected the world’s population?
The number of babies being born in a country each year is the birth rate .
The number of people who die in a country each year is the death rate .
These rates are measured for each 1000 of the population.
A country’s birth rate is 10. This means that 10 people are born for every 1000 of the population per year. If the country’s population was 10,000 then there would be 100 extra people in the country after one year. What do we mean when we talk about birth and death rates?
Natural increase The data from the birth and death rates can be used to work out the natural increase in a country’s population. Natural Increase = Birth rate - Death rate
If it is a positive number, the country’s population is increasing .
If it is a negative number, the country’s population is decreasing .
High birth rates combined with longer life expectancy have contributed towards the world population explosion.
Countries with a lot of money are called M ore E conomically D eveloped C ountries ( MEDC s).
The level of development of the country can impact on how quickly its population is rising.
Countries with less money are called L ess E conomically D eveloped C ountries ( LEDC s).
Less Developed countries
What’s the difference? A More Economically Developed Country (MEDC) usually has:
a high birth rate
a higher death rate than MEDCs
a large natural increase.
a low birth rate
a low death rate
a small natural increase.
Less Economically Developed Countries (LEDCs) tend to have: Which type of country do you think has the faster growing population?
Population structure MEDCs and LEDCs usually have differently structured populations due to differences in their birth and death rates. This shows the total population of males and females in different age ranges. The population structure of a country is usually drawn on a graph called a population pyramid . How would you describe the structure of this population pyramid?