The total water:
in the lakes and rivers of the world remains constant
under the ground remains constant
in the seas and oceans of the world remains constant
of the world remains constant
The minimum amount of water recommended by the United Nations per person per day is
25L
50L
75 L
40L
The water - bearing layer of the earth is called
conifer
hydrosphere
aquifer
water table
Organic impurities present in waste water
Pesticides
Nitrates
Phosphates
Metals
Check- dams were built on the river Rukmavati and its tributaries in Gujarat mainly to
generate hydropower
grow paddy crop
provide water to wild animals
recharge groundwater
Bacteria in water cause the disease.
Cold
Fever
Body Pains
Cholera
Which natural process continuously converts some of the saline sea water into freshwater?
Evaporation
Transpiration
Infiltration
Water cycle
The process of water seepage into the ground is called
evaporation
infiltration
precipitation
Chemical used to disinfect water.
Oxygen
Chlorine
Fluorine
Nitrogen
Plants use this gas during respiration
nitrogen
carbondioxide
oxygen
all the above
