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6) Approximately what percent of Earth's water is salt water?
a) 3
b) 70
c) 79
d) 97
7)World Water Day is celebrated on _____
a) March 22
b) January 22
c) October 22
d) November 22
8) What is the most abundant salt in the sea?
a) calcium chloride
b) potassium chloride
c) magnesium chloride
d) sodium chloride
9) What term is the measure of dissolved salts in water?
a) Thermocline
b) Salinity
c) Saltiness
d) Tides
10) What is the average salt content in a liter of sea water?
a) 39 gm
b) 37 gm
c) 35 gm
d) 32 gm
SUBJECTIVE
1 About …………………% of water is present in the 32 1 R E
oceans and ………………….% as ice-caps.
2 32 1 U A
Glaciers are source of which type of water?
