Floder og landformer

Floder spiller en vigtig rolle ved udformningen af ​​jordens overflade: de forårsager erosion, de bærer og deponerer sediment.

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Fosforcyklussen

Fosforcyklusen beskriver fosforbevægelsen gennem litosfæren, hydrosfæren og biosfæren.

The pollution of natural waters

Water is one of our key natural resources; we must protect it vigorously.

The Tundra: a green-edged icy wasteland

Is the tundra region as cold and deserted as many people think?

Vandfald

Vandfald danner hvor floden løber over en stejl afgrund.

Vindaflejringer i ørkener

Vind, som en ekstern kraft, spiller en vigtig rolle i udformningen af ​​ørkener.

Karstification

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

The moon

What secrets does the Moon have? Who were the first men on the Moon? You’ll find out everything...

The Baikal fault line

The deepest lake in Earth was formed in a rift valley created by the Baikal Rift Zone.

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