



SURVEY QUESTIONS 



Does all fire produce heat and all 

 heat produce fire ? 



What must be done to set a com- 

 bustible substance on fire ? 



Why does a fire sometimes go out 

 by itself? 



What is our greatest natural source 

 of heat? 



Do you know how heat travels from 

 one place to another? 



Do you know the scientific differ- 

 ence between heat and cold ? 



What instrument measures temper- 

 ature and how does this instru- 

 ment work? 



Galloway 



