The soil

Soil is the loose, uppermost, fertile layer of the Earth’s crust.

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Factors of warming

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

The Gregorian calendar

Developed nearly 500 years ago, it is a variant of the Julian calendar. Today it is the most...

Oasis

Within the lethal embrace of deserts, life can only flourish because of large springs. Here...

How do seas shape the Earth's surface?

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

Local winds

The most important types of local winds are the sea-land breeze, the mountain-valley breeze as...

Folding (advanced)

Lateral compressive forces cause rocks to form folds. This is how fold mountains are formed.

The development of lakes

Standing bodies of water can form in depressions on the surface by both endogenic and exogenic...

Geyser

A geyser is a spring characterised by intermittent discharge of water and steam.

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