well at firs they used what is called a meltoregeon to build it and now they use
A reading of the air pressure. It's handy for rough weather predictions.
When air pressure increases, the aneroid barometer contracts, causing the needle to move clockwise or indicate a higher pressure reading. Conversely, when air pressure decreases, the aneroid barometer expands, causing the needle to move counterclockwise or indicate a lower pressure reading.
how do meteorologist use a barometer
It is called a barometer, first developed in the 1600's
I chipped the glass tabletop when I dropped the barometer.
no
no
meteorologists use barometers
i checked the barometer to see the air pressure
Since the barometer read that the air pressure was high, the boy brought an umbrella outside.
Barometer