Which is the primary source of water on earth?
Ocean
Sea
Rain
River
When is World Water Day celebrated?
22nd March
23 rd March
24th March
22nd May
Which is the best way of irrigating crops?
Open wells
Closed wells
Step wells
Canals
Which are the largest water bodies on Earth?
Oceans
Rivers
Lakes
Seas
What helps to transport food and chemicals to the cells in human body?
Oxygen
Blood
Water
Carbon dioxide
What are dug wells?
Tube wells
What percentage of earth is made up of water?
70 %
60%
80%
50%
Which is a source of fresh water on the earth?
Seawater
Glaciers
Ocean water
Brackish water
What are baolis?
Underground water resource
Step well
A tribal group
A religious custom
Which is the life supporting gas on earth?
Hydrogen
Carbon
Nitrogen
