Air Pressure-Read about it

1.) What is air pressure?

a.) Air pressure is the result of the weight of a column or air pushing down on an area.

How does increasing the density of a gas affect its pressure?

b.)Increasing the density of a gas affects its pressure because the more dense a gas is, the more pressure it exerts.

2.) What two instruments are commonly used to measure air pressure?

a.) Two instruments commonly used to measure air pressure are the mercury barometer and the aneroid barometer.

What units are commonly used to measure air pressure?

b.) Units that are commonly used to measure air pressure are inches of mercury and millibars.

How many millibars are equal to 27.23 inches of mercury?

c.) 922.2801 millibars are equal to 27.23 inches of mercury.

3.) What is altitude?

a.) Altitude, or elevation, is the distance above sea level, the average level of the surface of the oceans.

As altitude increase, how does air pressure change?

b.) As altitude increases, air pressure changes because it decreases. It does not have the whole atmosphere pressing down on it and there is less weight present.

What changes in air pressure would you expect if you carried a barometer down a mine shaft?

c.) I would expect the barometer column of mercury to enhance since the air pressure is pushing down on the surface of mercury in the dish. Since a mine is below sea level, the air pressure is great thus heightening the mercury in the barometer.