The most common barometer, an aneroid barometer, is a tightly sealed metal bellow that expands when the air pressure is falling and shrinks when pressure is rising.
(The most common barometer; is; a tightly sealed metal bellow that expands when the air pressure is falling and shrinks) (a tightly sealed metal bellow; expands; T:when the air pressure is falling; T:when pressure is rising) (the air pressure; is falling; ) (pressure; is rising; )
The most common barometer a tightly sealed metal bellow the air pressure pressure
is expands is falling is rising
a tightly sealed metal bellow that expands when the air pressure is falling and shrinks
T:when the air pressure is falling T:when pressure is rising