How many percentages of world consist of oceans?
a) 90 %
b) 92 %
c) 97 %
d) 99%
Which of the following are the sources of surface water?
a) lakes
b) oceans
c) steppes
d) all of these
What is the percentage of lakes on the planet?
a) 1.5 %
b) 0.008 %
c) 0.5 %
d) 2 %
Which of the following are the natural pathway of rainwater and melted water?
a) lakes
b) rivers
c) both a & b
d) all of these
What are the percentage of rivers on earth?
a) 0.0002 %
b) 0.5 %
c) 1 %
d) 2 %
Which of the following subsurface are source of water?
a) rivers
b) lakes
c) aquifers(زیر زمین پانی)
d) all of these
