134 GENEKAL SCIENCE 



4. Why is it poor policy to cover ice in a refrigerator with paper? 



5. Why do vegetable men often place tubs of water near their 

 vegetables to keep them from freezing? 



6. Why will running water seldom freeze? 



7. Why does the bottom of a kettle never melt when water 

 is in it? 



8. Why is water used in the radiator of an automobile? 



9. Why will steam heat a room more quickly than hot water? 



10. Why is the air over a lake warmer when the water is freezing 

 than when the ice is melting? 



11. Why is it warmer during a thunder storm than directly after 

 the storm? 



12. Why is alcohol used in the radiator of an automobile during 

 winter time? 



14. Why will glycerin keep frost off the windows? 



15. Why do two pieces of ice stick after they have been squeezed 

 together? 



16. Why is a burn from steam at 212 F. so much more severe 

 than a burn from boiling water at 212 F.? 



17. Why are hot-water bottles better for warming a bed than 

 soapstone discs or flatirons? 



18. Why should thermometers for measuring the temperature of 

 a room be placed about 4 feet from the floor, away from a window 

 or door, and on a wall which is not exposed to the outside air? 



19. Why are steam boilers fitted with " alloy plugs "? 



20. Why do not plumbers use a piece of lead to mend a lead pipe? 



21. What is the temperature of the body in degrees C.? 



22. What is the temperature of the schoolroom in degrees C.? 



23. Why does the water in fruit and vegetables freeze less easily 

 than water in pans? 



24. How many Btu. of heat will be taken from an ice box for 

 each pound of ice melted if the temperature of the water coming 

 from the drain is 52 F.? 



25. What parts of Chapter V do you consider very important? 

 Why? 



