a
Thermometer
b
secchi disc
c
rain guage
d
Hydrometer
e
Wind vane
Explanation
Correct Option
bNo explanation available
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Discussions (2)

samsonDstrong
11 years ago
The correct spelling remains secchi disc, it has a handle like a fish hook. It''s colour is black & white, When inserted in water the distance at which the visiblity is seen is recorded.thats how it is used


