Lightning

Lightning is a sudden electrostatic discharge accompanied by a sound known as thunder.

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Terms of physical geography

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El Niño

Az El Niño jelensége szinte az egész Föld éghajlatára hatással van.

Tsunami

Tsunami waves are very high waves of immense destructive power.

The Gregorian calendar

Developed nearly 500 years ago, it is a variant of the Julian calendar. Today it is the most...

The River System of the Amazon

A Föld legbővizűbb folyama, az Amazonas és vízgyűjtő területének a bemutatása.

The terrestrial planets

Mercury, Venus, Earth and Mars may have they formed in much the same way, but only the Earth is...

Africa – The Climatic Anatomy of a Continent

Az afrikai kontinens vízszintes és függőleges éghajlati övezeteinek bemutatása.

Karstification

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

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