Question

What do the following indicate in a barometer regarding weather :
(a) gradual fall in the mercury level,
(b) sudden fall in the mercury level,
(c) gradual rise in the mercury level ?

Answer 1

(a) It indicates that the moisture is increasing i.e., there is a possibility of rain.

(b) It indicates the coming of a storm or cyclone.

(c) It indicates that the moisture is decreasing i.e., it indicates dry weather.