1 6 SCIENCE OF HOME AND COMMUNITY 



LABORATORY EXERCISE 2 



Purpose. To compare safety matches and ordinary matches. 



Apparatus. Safety matches, ordinary matches. 



Directions. Notice the parts of an ordinary match. How 

 does a safety match differ ? Light an ordinary match and note 

 the order in which each part burns. Do the same with a safety 

 match. Try to light each kind of match on an ordinary board 

 surface. What difference do you find? What advantage has 

 the safety match ? 



SUPPLEMENTARY QUESTIONS FOR CLASS DISCUSSION 



1 . Why are fireplaces still used ? 



2. What advantages has electricity as a means of heating? 



3. Why is the stove superior to the fireplace as a means of 

 heating ? 



4. What principles of physics are applied in each of the 

 methods used in heating our homes ? 



5. What are the chief differences between the hot water and 

 the steam methods of heating ? 



REFERENCE 



Barber, First Course in General Science, Henry Holt and Corn- 

 puny, New York City. Chap. 2. 



