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Upon physical weathering the rock only falls into pieces, whereas during chemical weathering its...
Atmospherical nitrogen is bound by bacteria and used by living organisms in the form of...
It is a sedimentary rock made up of loosely structured, rough grains of rock.
This video presents the different stages of coal formation.
The subtropics are located between the tropical and temperate zones, between 23.5° and 40°...
A video on the geological formation and geographical divisions of Africa.
Is the tundra region as cold and deserted as many people think?
Waterfalls form where the river flows over a steep precipice in its course.