main migration waves

The term migration in this area has two meanings: a broad,including all types of movements of humans, and another, morerestricted, it only takes into account such journeys involving a change of residence of those who perform them. Thus, in its broadest sense would include also the ebb and flow of population between the home and workplace.
Any migration process involves two concepts:
Emigration, which is the output of people from one country, place or region to settle in another country, place or region. Migrationinvolves a negative estimate of the standard of living of a person and their family environment and a perception that to settle elsewhere will increase their economic, social or otherwise, or atleast, that their hopes for a better life will be effective in the future.
Immigration is the arrival in a country of people from another country or place.
The most important form of migration since the nineteenth centuryto the present day is known as rural exodus, which is the massive displacement of population from rural to urban, millions of people move annually from rural to urban areas in all countries of the world (especially in developing countries) in search of better living conditions and, above all, greater employment opportunities.

population density

The density of population estimates the number of in habitants between the surface of the site.In general it is cosidered 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 density

The model of demographic transition progesses in four stages:
Old or preindustrial demographic regime :it is characterized by high mortality rates and birth rates.
First transition: keep the hight 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.

world population distribution

The world population is the total number of living humans beings on planet Earth

map of natural increase of world population

International migration has been a central element in enriching many cultures and civilisations throughout human history, supporting the process of global economic growth and contributing to the evolution of states and societies.

spanish population pyramid

The pyramid of the population in Spain indicates the percentage of people who are that age

synoptic chart of the spanish political system

Is the map that distinguishes different political powers

map of countries of the European Union

This map we used to know place where the different countries of theEuropean Union

Synoptic chart of the territorial organization of State

world water cycle

1: EVAPORATION: the heat causes the evaporation of surface water.


2: CONDENSATION: water vapor amounts. By doing so, it cools andturns into water droplets, giving rise to clouds.


3: PRECIPITATION: Water falls from clouds in the form of rain, snow orhail.


4: Two parts terceias evaporate the water fall back into the atmosphere.


5: RUNOFF: part of the precipitated water flows over the surface untillchegar a river, lake or sea.


6: IINFILTRATION: infiltrase Meanwhile on the ground. There can bepocketed forming deposits 
called underground water aquifers orflow to find an exit to the surface.

world climatological map

A  weather map  is one that shows  the general state of theatmosphere on a particular place in the earth's surface, and their data   refer to  average annual  temperature, annual  rainfall, type ofwinter weather, weather stations and sometimes  additional  information  such as  prevailing  wind  directions  and  hours of sunshinea year.

physical and political map of europe

The political map of Europe which are reflected all nations and capitals of the continent
Physical map of Europe there are rivers, mountains, ridges and more things