Formation of stratovolcanoes

Stratovolcanoes consist of layers of volcanic ash, debris and lava.

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The World of the seas

Seas and oceans cover almost three-quarters of the Earth’s surface. 97.5% of the total...

The Jovian planets

The four outer planets (Jupiter, Saturn, Neptune and Uranus) do not have solid surfaces, thus...

The soil

Soil is the loose, uppermost, fertile layer of the Earth’s crust.


A geyser is a spring characterised by intermittent discharge of water and steam.


The rise and drop of sea levels caused by the gravitational force of the Moon.

The rock cycle

Due to the effect of both exogenic and endogenic forces, rocks constantly change. This is called...

The weather forecast

The weather can be forecast with different meteorological instruments.

Climate zones

The Earth is divided into geographical and climatic zones, which result in the zonation of...

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