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Underjordisk vandkilder

Grundvand og akviferer er typer af underjordiske vande.

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Eratosthenes

The circumference of the Earth has already been calculated in ancient Egypt. The calculations...

Vandets kredsløb (elementær)

Vand på jorden er i en kontinuerlig tilstand af forandring. Vandsyklusen indbefatter...

Mineral or rock?

In this lesson you will learn more about minerals and rocks.

Volcanic activity

The area surrounding an inactive or extinct volcano is not necessarily calm. Let’s see the...

The formation of fog

Fog is a type of cloud that forms close to the surface of the Earth. There are places on the...

The path of bauxite

Bauxite is a raw material in aluminium production. Watch this video to learn how the well-known...

Varmfront, koldfront

Kolde og varme fronter dannes, hvor kold og varm luft mødes.

Klimazoner

Jorden er opdelt i geografiske og klimatiske zoner, hvilket resulterer i zonering af...

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