100 Our Surroundings 



13. If a small fire starts in a home, is it advisable to open or to close 

 the windows? Why? 



14. What should you do if your clothing catches fire? If that of a 

 companion catches fire? 



15. Why is it not possible to put out an oil fire by throwing water on it? 



PROJECTS 



1. Make a fire by striking a piece of flint with steel. 



2. Make and use a small fire extinguisher. 



3. Note news records of fires for a period of three weeks, making a 

 record of the known causes. Suggest methods of prevention. 



OUTDOOR OBSERVATION 



1. Build a small fire in a safe place. Note (a) effects of wind; (b) 

 combustion of different materials; (c) effects of earth or of water 

 in putting it out. 



2. Provide yourself with an ordinary thermometer and a note book, 

 and take a walk in your neighborhood. Take the air temperature 

 at different points in hollows, on hills, in the shade, and in the 

 sun. Take the temperature of any running water you pass, or any 

 still pool. Record observations, with conclusions as to causes for 

 differences in temperature readings. 



3. Observe and report on different types of fire escapes and exits in 

 schools and in large buildings. 



REFERENCES 



Introductory Physics, Chapter VI Higgins 



Fuels of the Household White 



Elementary Principles of Physics Fuller, Brownlee and Baker 



