... 



SURVEY QUESTIONS 



How do you know that air is all 

 around you? 



Why is air needed for fire ? 



Can air be weighed ? 



Can you prove that an " empty " 

 glass is really full ? 



How dots air on a tall mountain 

 differ from air at sea level ? 



Do you understand how the barom- 

 eter is used ? 



How does the atmosphere hold 

 things together? 



How do we breathe? 



Do you know how much air you 

 need every day? 



How much is " one atmosphere " ? 



Wright Pierce 



