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Barometer
The barometer is an instrument that measures atmospheric
pressure.It was invented by Evangelista Torricell in 1643.This is how it works.Air pushes down on the mercury inside.The mercury goes up and it measures air pressure.
Thermometer
The thermometer is an invention
that measures weather.
It was invented by Daniel Gabriel
Farenheit in 1709 .This is how it works.
When you bring it outside, or
put it in water a red line goes up
and we can see how hot or cold
it is.
Amazing Weather
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