“Catch water where it falls” is the basic idea behind
(a) recycling of water.
(b) making dams to store water.
(c) rain water harvesting.
(d) condensation of water vapour.
Floods cause extensive damage to
(a) crops.
(b) property and human life.
(c) domestic animals.
(d) all of the above.
Clouds are
(a) tiny drops of water floating in air.
(b) mixture of dust and water vapour.
(c) particles of water vapour.
(d) rain drops in air.
Transpiration is a process in which plants
(a) receive water from soil.
(b) absorb water vapour from air.
(c) prepare food from water.
(d) release water vapour.
In which of the following case evaporation of water will be
slowest?
(a) A tray of water kept in sunlight.
(b) A kettle of water kept on a burner.
(c) A glass of water kept in a room.
(d) A bucket of water kept on rooftop
The quantity of water required to produce one page of your
book is
(a) one bucket
(b) ten buckets
(c) two glasses
(d) few drops
In which of the following activities will you use minimum
amount of water?
(a) Bathing
(b) Brushing teeth
(c) Washing clothes
(d) Mopping a room