Geography: POP GROWTH

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Population Growth

World population is growing rapidly Always increasing at a faster rate

More

People (Natural

Increase) = High Birth Rate + Low Death

Rate

Less People (Natural Decrease) = High Death Rate + Low Birth Rate

Two factors affect population size:

Birth

Rate: No. live babies, per 1000, per yr

Death

Rate: No. deaths, per 1000, per yr

Population affected by migration

5 stages of Population Growth

Birth & Death rates

differ from country to country

Slow

or fast

Shown

in Demographic Transition model (DTM)

1. Total population

low & balanced:

High birth & death rates

2. Total population rising:

Death rates falling

Birth rates still high - improving health care

& sanitation

3. Rapid Natural

increase high:

Small gap between

birth & death rates

Availability of

contraception

Less children needed to work - mechanization of farming

4. Total population

high:

Balanced by low birth

& death rate

Birth control widely available & desire

for smaller families

5. Total population high,

rapidly falling:

Ageing population

Continued desire

for smaller families & to have children later in life

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