The natural elements such as mountains, rivers, vegetation, animals etc are created by nature is called __________environment.

The ___________ controls the extremes of temperature during day and night.

The complex system of interactions between the organisms and their physical environment in a particular area is referred as __________.

The term lithosphere means ___________.

The average thickness of the lithosphere is about ______km.

Grassland is a __________ ecosystem.

The __________ revolution began in England

________ supports all forms of life.

__________ is not a part of the man made environment.

The biosphere consists of the _________.