Population. geography

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How quickly is our global population growing and why?

Birth rate means how many babies are born each year.

Death rate means how many people die each year.

Natural increase is the difference between how many babies are born and how many are dying.

Formula:

DR-BR=NI

DR=Death Rate

BR=Birth rate

NI=Natural Increase

The humans population grows each year because there is a high birth rate compared to death rates.

The Demographic Transition Model:

The demographic transition model shows population change over time. It is divided into 4 or 5 stage, and the total population is different at each stage because of changing birth and death rates.

Migration is the movement of people moving from one place to another.

A migrant is a person who moves to another part of a country or a different country, often to work for a while.

Birth rate, death rate, migration- How do these affect the population?

They affect the population because if the birth rate is high then the population will increase however we will need more resources and they will be more pollution in the air. On the other hand, if the death rate is low then the population will still increase from the migrants moving there. Also the medication and education will encourage women to have children which will produce a high birth rate. Overall, the human population will keep on growing each year.

Population distribution

Population distribution is the term used to describe the pattern of where people live.

Population density

Population density is the term used to say how many people live in a certain area. e.g. 12km squared

Low population density

e.g. 2 km squared

High population density

e.g. 12km squared

Reason why:

Population density is low.........

Mountains- not many resources and harder to access

Poor quality housing

Poor quality schools

Not good medicine

Not enough resources

Rural area

Population density is high........

Urban area

High quality housing

Good schools

Good medicines

Lots of resources-nearby shops/markets

Dense-(high population density)

A good natural water supply nearby, such as rivers which can used for transportation, irrigation or hydroelectricity.

A maritime or continental climate-ideal for growing crops.

A coastal area- sea breezes, ports, harbours and beaches often make coastal areas a preferable place to be.

Sparse-(low population density)

A polar or desert climate- it is difficult to grow crops.

A mountainous region- difficult for transportation due to steep land,snow and ice.

Uk's population has grown over the past 2000 years

The graph line gradually shoot up near 1000-2000AD

Hunter gatherers live by hunting animals and gathering fruit and survival kit.

Timeline

Before 10,000 BC- hunter gatherers

Around 10,000 BC- We began to grow food and rear animals. The population began to rise.

About 3300BC - Stone Age/ stone for tools

Around 3300BC - Bronze Age/we discovered how to make bronze

About 1200BC - Iron age/ we learnt how to produce iron

farming methods and tool improved - population/ numbers grew faster

43AD - Romans invaded Britain/ world population about 200 million

Around 1760- Industrial Revolution/ population began to shoot up

Around 2012- Where will it all end/ Rise, rise, rise, rise ,rise, rise....

As the population grew towns, cities and places got bigger and bigger.

Population Pyramids:

There are two basic population pyramid shapes:

Population pyramid for a less economically developed country (LEDC)

Population pyramid for a more economically developed country (MEDC)

Key points on a population pyramid:

LEDC:

few old people - a low life expectancy

concave shape - a high death rate

MEDC:

large number of older people - long life expectancy

slightly more older women than men

steeper sides - lower death rate

narrow base - low birth rate