Eroded fault-block mountains

We can come across the remains of the Variscan and Caledonian mountain systems almost anywhere in the world.

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An earthquake is one of the most devastating natural phenomena.

The work of glaciers

A glacier is a large body of ice in constant, slow motion down a hillside.

Mediterranean climate

It is characterised by dry, hot summers and mild winters.

Oxygen cycle

The oxygen cycle describes the movement of oxygen within its three main reservoirs.


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


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

Greenhouse effect

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

The formation of fog

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

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