32 A YEAR IN SCIENCE 



Questions 



1. Who was Galileo ? Tell something of his work. 



2. What is temperature and how is it measured ? 



3. State the principle upon which the thermometer 

 is based. 



4. Give several reasons why mercury is the most 

 satisfactory of all known substances for use in ordinary 

 thermometers. 



5. Would the range of a mercurial thermometer of 

 given length be increased or decreased by reducing the 

 size of the bulb? By making the bore of the tube 

 smaller? Would the distance representing a degree be 

 increased or decreased? 



6. How would the readings of a thermometer be 

 affected if the bulb should contract after the gradua- 

 tions had been made? 



.7. How would you proceed to test experimentally 

 the points on a mercurial thermometer ? 



8. The following temperature measurements were 

 taken with a Fahrenheit thermometer: 77, 41, 14, 

 4, 40. What would a centigrade thermometer 

 have indicated? 



9. The difference in temperature between two ves- 

 sels of water is 35 C. What is the difference in F. 

 reading ? 



10. A 100 g. mass of copper rises in temperature 

 from 15 C. to 100 C. How much heat does it absorb? 



11. Who was Fahrenheit? 



12. Do you know why he established 32 on his 

 thermometer as the freezing point and 212 as the boil- 

 ing point of water? 



13. Who was Celsius? 



14. What is the meaning of centigrade ? 



