DemographyDemography is the science that studies these characteristics is called The absolute population of an area is the number of inhabitants in that area The life expectancy is the average number of years that people live. Natural increase is the difference between the number of births and thenumber of deaths. NATURAL INCREASE = BIRTH RATE - DEATH RATE -Positive = increases (births > deaths) - Negative = decreases (deaths > births) ACTUAL INCREASE = NATURAL INCREASE + NUMBER OF INMIGRANTS - NUMBER OF EMIGRANTS Population density shows how populated an area is. POPULATION DENSITY = POPULATION (NUMBER OF PEOPLE) / KM2 In Spain...Higher life expectancy because: Better quaility of life (medical care, hygiene, nutritious food...).. In 1900 it was 35 years. Now it's 81 years. Positive Natural increase because: Although the birth rate hasn’t increased, the death rate has experienced a decrease. In 1900 --> 18 million inhabitants. Today --> 46 million inhabitants Positive Actual increase because: Inmigration Population density of 93 inhabitans per square kilometre. The 78% of the population live in urban areas. The most denisity populated areas are: -Large cities (Madrid, Barcelona...) -Coastal areas (Valencia, Islas Baleares...) Population pyramidTo understand how population is distributed in a country or continent. The graph compares the male and female population in different age groups. In Europe...Europe is a very prosperous, highly populated continent. It has the third largest population in the world, after Asia and Africa. About 730 million people live in Europe. Europe’s population is still growing, mainly due to migratory movements Europe’s population density:t 105 inhabitants per square kilometre. The countries with the highest population density are Belgium, Italy, Germany, the UK and the Netherlands. Among the less populated countries in Europe are Norway, Sweden and Finland. About 75% of the European population lives in urban areas. The biggest cities are Moscow, Paris, London, Madrid, Berlin, Rome and Athens. The birth rate is low but the death rate is also low. Life expectancy in Europe is now around 80 years. Europe is an ageing continent: the number of people over 65 is almost the same as the number of young people. In the future, there will be more people who need pensions and healthcare and there will be fewer people to pay for them. In the world...There are over 7 billion people in the world and this number is constantly growing. In one year about 130 million babies are born and about 55 million people die. This means that the global population grows by about 75 million a year. MigrationsInternational emigration: inhabitants that leave the country. During the 20th century many spaniards emigrated to America and European countries (Germany, France, UK...). International inmigration: new inhabitants that come to a country. At the end of the 20th century Spain received many inmigrants. Nowadays there are about 5 or 6 million of inmigrants in Spain. Internal migration: movements within a country. During the second half of the 20th century there was a rural exodus: many people from rural areas moved to cities. EFFECTS OF MIGRATORY MOVEMENTS: -Positive effects: 1. Increase of economically active population: many immigrants are of working age. 2. Higher birth rate: immigrants are usually adults and, as such, are able to have children. Societies all over the world have become more multicultural in recent years because of migratory movements. -Negative effects: some people get into a country illegally or by risking their lives. This can lead to an underground economy. For this reason countries sometimes restrict the number of immigrants that are allowed in.
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AuthorTeacher Belén Archives
May 2017
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