1. Total earth’s surface covered by water is (a) 75% (b) 60% (c) 85% (d) 50%

Soln:

Answer is (a) 75%

Explanation:

96.5% of the water is found in sea’s and oceans , 17% is groundwater, 1.7% in icecaps and glaciers. 0.001% as vapor and 2.5% fresh water.