Solar eclipse and lunar eclipse

We can observe quite interesting astronomical phenomena when the Earth, the Sun and the Moon align.

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Tide

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

Mountain climate zones

The decisive factor that determines the climate zones of mountains is the altitude above sea level.

Carbon cycle

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

Glacier (basic)

A glacier is a large body of ice that forms from snow, and is in constant, slow motion.

Natural gas and petroleum

Natural gas and petroleum are among the most important sources of energy and raw materials today.

Glacier (intermediate)

A glacier is a large body of ice that forms from snow, and is in constant, slow motion.

The phosphorus cycle

The phosphorus cycle describes the movement of phosphorus through the lithosphere,...

Eratosthenes

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

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