The World of the seas

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

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Polluting natural waters

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

Volcanic activity

This animation demonstrates different types of volcanic eruptions

Wind at the beach

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

The atmosphere

The atmosphere surrounds us everywhere on this planet. We take its presence so much for granted...

Weather and climate

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

The Tundra: a green-edged icy wasteland

Is the tundra region as cold and deserted as many people think?

The water cycle (basic)

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

Cloud formation

When the temperature of the cooling air reaches dew point condensation occurs because air is...

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