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

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Formation of stratovolcanoes

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

Types of lakes

Still waters take various forms on the planet. Let’s take a look at how we can group them.

Wind at the beach

Sea and land breeze form because of the differing warming of land and sea.

Mediterranean climate

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

The Gregorian calendar

Developed nearly 500 years ago, it is a variant of the Julian calendar. Today it is the most...


The last Ice Age ended about 13 thousand years ago.


A fjord is a long, narrow inlet with steep sides, created in a valley carved by glacial...

Carbon cycle

Carbon is bound in organic substances during photosynthesis, while during breathing, it...

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