Waterfall

Waterfalls form where the river flows over a steep precipice in its course.

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How do seas shape the Earth's surface?

Seawater, as an external force, plays an important role in shaping coastlines.

Tsunami

Tsunami waves are very high waves of immense destructive power.

Eratosthenes

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

Fascinating atmospheric phenomena

We can often observe spectacular atmospheric phenomena. Let's see how some of these are formed.

Tide

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

Volcanic activity

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

Faulting (basic)

Vertical forces can break up layers of rock into fault blocks, which then move vertically...

Weather and climate

Climate is the typical weather of a certain region that changes practically only on a geological...

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