CONTENTS 



PAGE 



CHAPTER I. MATTER 1 



What we understand by Science; Definition of matter; 

 Is air matter; Three forms of matter. 



CHAPTER II. CONSTITUTION OF MATTER 6 



Introduction: Some common observations; Molecular 

 theory; Molecules in solids; Molecules in liquids; Molecules 

 in gases; Molecules in different states; Different sizes of 

 molecules and inter-molecular spaces. 



CHAPTER III. EFFECT OF HEAT ox MATTER 13 



Effect Of heat on solids; Effect of heat on liquids; An 

 exception to the rule; The effect of a change of tempera- 

 ture upon gases. 



CHAPTER IV. TRANSFER OF HEAT 20 



Conduction; Tireless cookers; Explanation of conduction; 

 Convection; Convection due to displacement of molecules. 



CHAPTER V. MEASUREMENT OF TEMPERATURE; THERMOMETRY. 26 

 Introduction; Galileo's thermometer; Mercury thermome- 

 ters; Fahrenheit; Centigrade; Construction of centigrade 

 thermometer ; Determination of freezing and boiling points ; 

 Value of a centigrade degree in terms of Fahrenheit and 

 vice-versa: Range of mercury thermometer; Unit of heat 

 measure. 



CHAPTER VI. CHANGES IN STATE OF MATTER 34 



Three states of matter; Change from solid to liquid, and 

 liquid to gas; Quantity of heat necessary to change ice to 

 water; Heat necessary to dissolve a substance; Heat given 

 off when liquids become solids; Melting points; Boiling 

 points; Distillation; Effect of change of pressure on boil- 

 ing point; Quantity of heat used in changing water to 

 steam; Heat withdrawn in evaporation of liquids; Arti- 

 ficial ice ; Heat given off in condensation ; Change in volume 

 resulting from change in state; Molecular changes resulting 

 from change in state. 



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