Oasis

Within the lethal embrace of deserts, life can only flourish because of large springs. Here plants thrive, animals enjoy something to drink, caravans can have a rest and people too can develop their own way of life.

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The World of the seas

Seas and oceans cover almost three-quarters of the Earth’s surface. 97.5% of the total...

Solar eclipse and lunar eclipse

We can observe quite interesting astronomical phenomena when the Earth, the Sun and the Moon align.

Factors of warming

The duration of solar radiation, the angle of the Sun and the surface albedo all have an effect...

Loess

It is a sedimentary rock made up of loosely structured, rough grains of rock.

Altitudinal zonation

In mountainous areas the climate, soil properties, the flora and fauna change depending on...

Cloud formation, types of clouds

Evaporating surface water forms clouds of various shapes from which water falls back to the...

Karstification

The dissolution of limestone results in the development of karst formations.

Mountain climate zones

The decisive factor that determines the climate zones of mountains is the altitude above sea level.

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