X1021947237-00083-18307</DOCNO> weather7 WEATHER ACTIVITIES ATMOSPHERIC PRESSURE A barometer is a relatively simple instrument that measures the pressure of surrounding air (atmospheric pressure).
(A barometer; is; a relatively simple instrument that measures the pressure of surrounding air (atmospheric pressure)) (a relatively simple instrument; measures; the pressure of surrounding air)
A barometer a relatively simple instrument
is measures
a relatively simple instrument that measures the pressure of surrounding air (atmospheric pressure)
the pressure of surrounding air