1. Properties of Air 6C If it’s in YELLOW, write it down.

2. A. Composition of Air Air is made up of  78% Nitrogen  21% Oxygen  1% Other gases Draw this image.

3. B. Properties Of Air 1. MASS – the amount of 1. MASS – the amount of matter (atoms) matter (atoms) in an object. in an object. Remember the Balloon and Balance Experiment?

4. Properties Of Air (continued) 2. DENSITY – the amount of mass in a given volume. in a given volume. Remember the density column we made in class?

5. Properties Of Air (Continued) 2. VOLUME- the amount of space an object takes up an object takes up  Napkin in a Cup of Water  Balloon in a Bottle

6. Properties of Air (continued) 4. AIR PRESSURE – the amount of air pushing – the amount of air pushing down on an area. down on an area. Blow up balloon Egg in a Bottle Click me.

7. C. Measuring Air Pressure 1. AIR PRESSURE – increases as 1. AIR PRESSURE – increases as you go closer to the Earth you go closer to the Earth There is so much air above you that at sea level you have 14.7 lbs/in 2 pushing on you. That’s 10 bags of sugar per every inch of skin on your body.

8. C. Measuring air pressure continued 2. Tools to measure Air Pressure Barometers to Barometers to measure air measure air pressure. pressure.

9. C. Measuring air pressure continued 3. Units of Air Pressure: Millibars Millibars  TV weather stations and aviation use inches of mercury.  Meteorologists use millibars, an SI unit.