___________are often used to transport logs.
pond
lakes
river
road
What slows down the flow of water?
Check dams
boiling
precipitation
salinity
The huge body of water is:
lake
an ocean
Ground water is the____________source of water for man.
Ordinary
secondary
main
unimportant
The longest river in the world
Nile
Ganga
Amazon
Krishna
Areas that receive large amount of rainfall have the problems of flood and marshy lands in:
Desert areas
Polar areas
Equatorial areas
Hilly areas
Snowfall that is accompanied with rain is called:
glacier
Sleet
Fog
Which of the following is most essential for all types of life on earth?
water
buildings
clothes
food
Acid rain is a type of __________pollution.
air
sound
soil
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
