Why does a barometer read higher at Bombay than at Simla ?

Why mercury rises in a barometer ?

How does barometer forecast the weather ?

A sudden fall in barometer reading indicates that the weather will be 1 Unturbulent 2 Rainy 3 Cool 4 Very hot

IB Intelligence Bureau,

If the reading in a barometer falls down suddenly then it is an indication that the weather is going to be??.. 1 Extremely hot 2 Extremely cool 3 Dry & calm-quiet 4 Very stormy

A gradual rise in barometer height indicates (1) Approach of fair weather (2) Approach of an immediate storm (3) Likelihood of rainfall (4) Nothing significant

Explain about Barometer?