Glacier (basic)

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

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The water cycle (intermediate)

Water on Earth is in a continuous state of change. The water cycle includes processes...

Topography of the Earth

The animation presents the largest mountains, plains, rivers, lakes and deserts of the Earth.

Tectonic plates

Tectonic plates can move in relation to each other.

The water cycle (basic)

Water on Earth is in a continuous state of change. The water cycle includes processes...

Living fossils

Learn about animal species that emerged in the distant past and stayed mostly unchanged

Karst region (basic)

Karst formations include dolines and dripstones.

Tide

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

Polluting natural waters

Water is one of our key natural resources; we must protect it vigorously.

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