Weather fronts

When masses of cold and warm air meet, weather fronts develop.

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The atmosphere

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

Why is seawater salty?

Water covers about 71% of the Earth’s surface. But why are there two types of water on Earth,...

Wind at the beach

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


Tsunami waves are very high waves of immense destructive power.


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

Factors of warming

The duration of solar radiation, the angle of the Sun's rays and the surface albedo all have an...

Cloud formation, types of clouds

Evaporating surface water forms clouds of various shapes from which water falls back to the...

Karst region (basic)

Karst formations include dolines and dripstones.

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