A river is a natural flowing watercourse, usually freshwater, flowing towards an..
The Earth began as a cloud of dust and hot, shinning gas
Grottos are underwater cavities excavated from the rocks by the effect of erosion.
Lakes are expanses of water, generally calm, which fill up hollows of the Earth.
An Aquatic ecosystem is a habitat comprising of living beings residing within a water body.
A sea is a large body of salt water that is surrounded in whole or in part by land.
Sea Waves are formed on the surface of seas and oceans.
Fascinating facts about our world
