1G2; ; WATER 



2. If your clothing should be set on fire, what 

 would you do. 4 What would you do if you saw the 

 clothing of another person burning? 



3. Why are you sure that there must be air. in 

 water? 



4. How much air does a person spoil by breathing 

 for one hour? 



5. What is the best kind of light to use in our 

 Houses? Why? 



6. Why are brick houses sometimes damp? Could 

 the dampness have been prevented? 



7. Why do we stir or beat frosting for cake for a 

 long time? If we did not beat fudge what would be the 

 result? 



8. What is meant by evaporation? W r hat causes 

 evaporation to be more rapid? 



9. When do we need the more water for drinking, 

 when we have been perspiring a great deal, or hardly 

 perspiring at all? 



10. Explain how harmful drinks may harm us 

 although we may not notice the harm. 



39. Water for Cleansing. 



The most important use for water is for drinking. 

 We shall see in the next section that plants, as well as 

 animals, require a large amount of water in order to live. 

 The use for water which is next in importance to its. use 

 for drinking and for plants, is its use for cleansing. Water 

 owes its power of cleansing to its ability to dissolve so 

 many substances. 



We know that if water has some dissolved substance 



