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SCIENCE
UNIT 12
SOCIETY
• Population
The population of a place changes continually
because of the birthrate, the death rate,
emigration and immigration.
The birth rate is the number of people born in a
place every year. The death rate is the number
of people who die in a place every year.
The natural growth rate is the difference
between the birth and death rates. It can be
positive or negative.
We obtain the real growth rate by adding and
subtracting immigration and emigration to the
natural growth rate.
• The population of Spain
The population of Spain has increased a lot
because of a decrease in the death rate and an
increase in the rate of immigration.
Population density in Spain
Population density tells us if a territory has a lot
of inhabitants or a few. We calculate it by
dividing the number of inhabitants of the
territory by the surface area of the territory.
Spain has population density of 90 inhabitants
per square kilometre.
Population distribution in Spain
Lesson vocabulary
Population: población
To change: cambiar
Birth rate: tasa de natalidad
Death rate: tasa de mortalidad
To die: morir
Natural growth: crecimiento natural
Real growth: crecimiento real
To add: sumar
To subtract: restar
To increase: aumentar
To decrease: disminuir
Density: densidad
To tell: decir
Inhabitant: habitante
Per square kilometre: por kilómetro cuadrado

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Unit 12

  • 2. • Population The population of a place changes continually because of the birthrate, the death rate, emigration and immigration. The birth rate is the number of people born in a place every year. The death rate is the number of people who die in a place every year. The natural growth rate is the difference between the birth and death rates. It can be positive or negative. We obtain the real growth rate by adding and subtracting immigration and emigration to the natural growth rate.
  • 3. • The population of Spain The population of Spain has increased a lot because of a decrease in the death rate and an increase in the rate of immigration. Population density in Spain Population density tells us if a territory has a lot of inhabitants or a few. We calculate it by dividing the number of inhabitants of the territory by the surface area of the territory. Spain has population density of 90 inhabitants per square kilometre.
  • 5. Lesson vocabulary Population: población To change: cambiar Birth rate: tasa de natalidad Death rate: tasa de mortalidad To die: morir Natural growth: crecimiento natural Real growth: crecimiento real To add: sumar To subtract: restar To increase: aumentar To decrease: disminuir Density: densidad To tell: decir Inhabitant: habitante Per square kilometre: por kilómetro cuadrado