Model of population cycle

Stage 1 -High Fluctuating (birth rate and death rate very high)

Stage 2- early expanding (birth rate high and death rate falling)

Stage 3 -Late expanding (birth rate starts to fall and death rate continues to fall)

Stage 4 -Low stationary (burth rate and death rate both low. Population steady)

Synoptic chart of the Spanish political system

 I couldn't find any synoptic chart of the Spanish political system in English, but here is another in Spanish.

World population distribution

 The purple zones are the most inhabitated, but the white zones are almost uninabitated.

In this picture we can see the quantities of the population in the different continents in different years.

Main migration waves

Nowadays, the main migration waves are from Middle America to the USA, Argentina, Europe or Australia. But, in the past was the opposite, because there was a lot of money in the Middle America countries (like Mexico, Colombia...) and the countries of Europe didn't had much money,so the population emigrate to these countries.

Map of the countries of the European Union

Synoptic chart of the terriotorial organization of a state

World water cycle

This picture shows us the world water cycle. First the water is evaporated, then it rises and condenses and it forms clouds. When it is cooled it fall down, this is the precipitacion. It can be snow or rain. The water flows on the surface and it forms rivers, lakes...., or the ground sucks it. This is the infiltration. The water that the ground sucks form aquifers. The water of the rivers flows into the sea or oceans and the water cycle repeats.