Rainfall is measured with an instrument called the ___________.

Atmospheric pressure is measured by a portable instrument called the ___________.

___________ are narrow glass tubes filled with either mercury or alcohol.

____________ measured by a portable instrument called the barometer.

____________ helps in weather forecasting.

Wind is the air blowing from ______________.

The ___________ varies not only from the time to time but also from place to place.

__________ conditions include temperature,atmospheric pressure,rainfall,humidity etc.

The ____________ is the highest at sea level and goes on decreasing with the increase in altitude.

An ___________ has three or four horizontal arms attached to a high vertical spindle.