Day 41 Investigation 8 part 1 Air Pressure Inquiry

Arrows Visualization Exercise 8.1

Resources, P. 49

Labels and Connection to text Visualization Exercise 8.2

Resources, P. 50

Reading Starting on page 48 of your resource book read “What is Air Pressure” Answer the “Think Questions” on page 52.

Barometer Measures air pressure Baro- means pressure -meter- means measure

Aneroid Barometer How does an aneroid barometer work? –As pressure changes, a spring will coil and uncoil and give us a reading in millibars What is the advantage? –Small and compact

Mercury Barometer Long glass tube filled with mercury, placed in a dish of mercury Force of air on the surface of mercury pushes the column of mercury up the tube Although mercury is very toxic, what is the advantage? –Very accurate

Units Bars –Used to measure air pressure –Equal to the pressure exerted by air in the atmosphere at sea level Millibar (mb) –Unit used to measure atmospheric pressure –1/1000 of a bar –average sea-level air pressure = 1013 mb

Response Sheet-Air Pressure and Wind Pull out page 47 of your lab book and answer the question.