Ground water is the____________source of water for man.
Ordinary
secondary
main
unimportant
Area that slopes down on drains to the main river is called:
river basin
mouth of the river
head of the river
tail of the river
Heat of sun changes water in to :
Rain
Snow
Vapour
Dew
What makes the lake saline?
it is perennial
it is fresh
high rate of evaporation
it is non-perennial
Areas that receive large amount of rainfall have the problems of flood and marshy lands in:
Desert areas
Polar areas
Equatorial areas
Hilly areas
Large amount of _______________is buried in the ocean floor.
steel
cars
gold
petroleum
Supply of water to farms is called :
extraction
irrigation
inflation
percolation
Area that receive little rainfall face drought conditions in :
polar areas
desert areas
Mountain areas
The store house of many resources like fish,minerals and energy is______.
river
pond
oceans
sea
Big dams are being built across:
Oceans
Lakes
Rivers
Pond
