| A | B |
|---|
| When air gets cold, molecules | move slower and take up less space |
| What is atmospheric pressure? | The sum total of the individual or partial pressure exerted by each component gas of the atmosphere |
| What weighs more? Dry air or moist air? | Dry air |
| What does moist air consist of? | Dry air and water vapor |
| What is dry air composed of? | Nitrogen and oxygen |
| What is the atmospheric pressure you feel? | The weight of the atmosphere above thatÕs pushing down on every square inch of you |
| What is the average atmospheric pressure at sea level? | 14.7 pounds per sq. inch |
| What is a barometer? | an instrument for measuring the pressure of the air |
| Who discovered the barometer? | Torricelli |
| Why was mercury used in the barometers? | It is the heaviest of all liquids. |
| What does an aneroid barometer do? | Measures air pressure without using fluid. |
| What does aneroid mean? | Without fluid |
| What can you use at your house to measure atmospheric pressure? | A recording barograph |
| A aneroid barometer that is graduated to read in feet above the ground is called a/an ____. | altimeter |
