THE HEAT OF THE BODY 123 



Before making your review summary, test your knowledge of 

 the facts of the unit by checking over the text so as to be sure to 

 know the facts underlying the generalizations. Then, using the 

 generalizations, the material in the text, and everything you have 

 read, seen, or done yourself, make a summary outline for your 

 notebook. This outline you may use when you make a recitation. 



TEST ON FUNDAMENTAL CONCEPTS 



Make two vertical columns in your workbook. Head one CORRECT and 

 the other INCORRECT. Under the first place the numbers of all the state- 

 ments you believe to be correct. Under the second place all the numbers 

 you believe to be incorrect. Your grade = right answers X 2. 



I. Before we can start a fire we must have : (1) heat ; (2) nitro- 

 gen ; (3) oxygen ; (4) an incombustible substance ; (5) inflam- 

 mable material. 



II. Heat travels from : (6) the sun to the earth by conduction; 

 (7) a flat iron to clothes being ironed by conduction ; (8) hot coals 

 to a kettle above by radiation ; (9) a soldering iron to the solder 

 by convection ; (10) a fireplace to objects in the room by conduction. 



III. When heat is applied to water, it may change its : (11) tem- 

 perature; (12) state to a solid; (13) size; (14) weight; (15) com- 

 position. 



IV. The temperature of boiling water is: (16) 32 F. at sea 

 level; (17) less on tall mountains than at sea level; (18) greater 

 in a partial vacuum; (19) never over 212 F. in a pressure cooker ; 

 (20) always the same 98.6 F. 



V. There is a change in temperature when: (21) water cools; 



(22) water at 32 F. changes to water at the boiling point; 



(23) steam at the boiling point condenses ; (24) ice melts ; (25) a 

 hot iron is put into cold water. 



VI. The principle of heat insulation is used when we use : 

 (26) storm windows; (27) the pressure cooker; (28) hot-water 

 bottle ; (29) asbestos mats on the table ; (30) copper for hot-water 

 pipes. 



VII. Wool fiber: (31) is a fine, flattened, and twisted fiber; 

 (32) will dissolve in a 5 per cent sodium hydroxide solution ; (33) ab- 

 sorbs water more freely than cotton; (34) conducts heat well; 

 (35) burns faster than linen. 



VIII. Cotton fiber : (36) gives the odor of burning feathers 

 when burned ; (37) will dissolve in a 5 per cent sodium hydroxide 

 solution ; (38) is a thick, lustrous fiber ; (39) has the same chemical 

 composition as the material from which rayon is made; (40) is 

 a vegetable fiber. 



