The surface of the Earth has been formed into its present state both by external and internal...
Rivers play an important role in shaping the Earth's surface: they cause erosion as well as...
This video presents the different stages of coal formation.
The decisive factor that determines the climate zones of mountains is the altitude above sea level.
Lateral compressive forces cause rocks to form folds. This is how fold mountains are formed.
Developed nearly 500 years ago, it is a variant of the Julian calendar. Today it is the most...
Wind, as an external force, plays an important role in shaping coastal areas and steppes.
The rise and drop of sea levels caused by the gravitational force of the Moon.