Which of these water sources is a major source of freshwater?
Polar ice caps
Underground water
Rivers and lakes
Oceans
Polar Icecaps and Glaciers contain 68%, underground water contains 30% and rivers and lakes contain 1% of the total freshwater.
The ultimate source of all water on the earth is
(a) oceans and seas
(b) spring and wells
(c) rivers and lakes
(d) rain
Akshit was very thirsty and went to draw water from his water purifier. But he found that the water tank was empty and needed to be refilled. Now, Akshit is wondering how come the water in rivers, lakes, seas and oceans never get over. Can you tell him why the water in these sources never gets over? [3 MARKS]
Akshit knows that water in rivers, ponds and oceans is in liquid state but he is not sure about where he can get other forms of water viz. ice and water vapour. Can you tell him about different sources where he can get other forms of water ? [3 MARKS]