How lakes disappear

On a geological time scale lakes are short-lived.

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Glacier (intermediate)

A glacier is a large body of ice that forms from snow, and is in constant, slow motion.

The atmosphere

The atmosphere surrounds us everywhere on this planet. We take its presence so much for granted...

Icebergs

Icebergs are small or large blocks of frozen freshwater floating in the sea.

Minerals

Rocks are a composed of minerals. These minerals can often be found in their pure forms.

Atmospheric circulation

The difference between the temperature of the polar and equatorial zones causes...

Nitrogen cycle

Atmospherical nitrogen is bound by bacteria and used by living organisms in the form of...

Mountain climate zones

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

Greenhouse effect

Human activity increases the greenhouse effect and leads to global warming.

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