430 A YEAR IX SCIENCE 



The carelessness of just one individual may be the cause 

 of much sickness and many deaths. 



Questions 



1. Name ten preventable diseases. 



2. To what extent is a community responsible for 

 the spread of such diseases? 



3. State six methods of destroying germs. 



4. What is a disinfectant ? Name five disinfectants. 



5. How should a room be fumigated? 



6. What should be our attitude toward quaran- 

 tine? Why? 



7. How can we guard against infection from foods ? 



8. Discuss the relation between insects and diseases. 



9. How may milk become contaminated? What 

 diseases may be spread by milk? 



10. Are there any objections to running sewage 

 into bodies of water from which the water supply for 

 the city is obtained? 



11. Are there better methods for disposing of sewage ? 



12. When should one use only boiled w^ater? 



13. Learn what you can of the work done by the 

 Board of Health in your city. 



