Population density.

The density of population estimates the number of inhabitants between the surface of  the site. 

In general it is considered that an area is sparsely populated has a density of 10 inha./km2.  And that is a very populated area if the density exceeds 80 inha./km2.

Model of population cycle.

The model of demographic transition progresses in four stages:

-Old or preindustrial demographic regime: it is characterized by high mortality rates and birth rates.

-First transition: Keep the high birth rate, but mortality drops.

-Second transition: the birth rate begins to decline, but mortality is still down more slowly.

-Modern demographic regime: Mortality rates and very low birth.

Population world map.

Causas de nacimiento:
-A medida que la economía
-Virilidad las mujeres casadas acess en el mercado laboral de la ingnorancia (pensamiento: Nuestros hijos van a morir Muy joven)
-Causas psicológicas
-Celivato
-De acuerdo con la política
-Puede ser prenatal (animarles a tener hijos) o anti-natalistas (Amim no tener hijos).

Map of natural increase of world population.

Actualmente hay 49 estados independientes en Europa.
  - Diferencias:

• Dependiendo de su longitud: la regla es la más grande de Rusia y la más pequeña de Andorra

• Dependiendo de su situación: casi todas tienen vistas al mar

• Dependiendo de su forma: Muchos están fragmentados

• De acuerdo con su población: La más poblada es Rusia y el menos poblado es San Marino

• De acuerdo a su riqueza: más ricos y más pobres son el alemán y Moldavia.

Spanish population pyramide.

A population pyramid is a graph that representing the structure of the population into age groups and sex groups .

To make a population pyramid  need to know the number of its inhabitants, expressed in percentages.

Map of countries of the European Union.

Currently there are 49 independent states in Europe. Some states today have their origin in the very recent changes that have occurred since 1989, after the fall of communism in Eastern Europe.

Synoptic chart of teterritorial organization of state

Synoptic chart of Spanish political system.

World water cycle.

The water is continually moving. Reçber What the name of the water cycle.
1.Evaporación: The heat causes the evaporation of surface water
2.Condesación: The vapor cools affects what gives rise to clouds.
3.Precipitación: Water from the clouds falls as snow, rain or hail.
4. Part of the water fall back to cycle.
5.Unha of the water goes to rivers and lakes seas or oceans.
6. The other part of the water  is  absorbing of the land and  form aquifers.

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World climatological map.

On Earth distinguish five major climatic zones according to latitude: a hot zone, two temperate zones and two cold regions. Within these differentiate various types:

• Warm climates are found in the intertropical zone.

     - Equatorial climate.
     - Tropical climate.
     - Desert climate.

• Climates termperados-giving between the tropics and polar circles.

     - Mediterranean climate.
     - Atléntico or oceanic climate.
     - Continental climate.

• Cold climates occur in the polar regions and high mountain areas.

     - Polar climate.
     - Climate of high mountains.