USING W 'ATE R 



71 



REFERENCES FOR FURTHER STUDY 



Texts 



Caldwell and Curtis, Science for Today, Chap. 5 



Clement, Collister, and Thurston, Our Surroundings, Chap. 5 



Hunter and Whitman, My Own Science Problems, Unit 4 



Lake, Harley, and Welton, Exploring the World of Science, 

 Chaps. 6, 7 



Pieper and Beauchamp, Everyday Problems in Science, Unit 



5 



Powers, Neuner, and Bruner, The World around Us, Chaps. 

 6,7 



Skilling, Tours through the World of Science, Tour 4 



Van Buskirk and Smith, The Science of Everyday Life, Chap. 

 5 



Watkins and Bedell, General Science for Today, Chap. 4 



Wehb and Beauchamp, Science by Observation and Experi- 

 ment, Units, 1, 3, 4 (parts) 



Wood and Carpenter, Our Environment: Its Relation to Us, 

 Unit 1 ; Our Environment: Hcnv We Adapt Ourselves to It, 

 Unit 3; Our Environment: Hcnv We Use and Control It, 

 Chap. 6 



Special references 



Garnett, A Little Book on Water Supply 



Prudden, Drinking Water and Ice Supplies 



Farmers' Bulletins, U. S. Department of Agriculture 

 No. 941, Water Systems for Farm Homes 

 No. 478, How to Prevent Typhoid Fever 



Reports and miscellaneous bulletins from Water Commis- 

 sioners of New York, N.Y. ; St. Louis, Mo. ; Tucson, Ariz. ; 

 Los Angeles, Calif. 



WHAT YOU SHOULD AIM TO ACQUIRE FROM 

 THIS STUDY 



* 



1. A realization of the importance of a pure water 

 supply. 



2. A knowledge of how various types of communi- 

 ties obtain an adequate supply of pure water. 



3. A knowledge of the types of impurities found in 

 water, their sources and dangers, and the methods 

 used in removing them from water on a large scale. 



TEST OF MASTERY OF THE TOPIC 



In your notebook complete the statements, answer the 

 question, and comply with the instructions. 



1. Water is composed of the two elements, and 



2. Four different kinds of impurities found in water are 



3. What factors should you consider in determining 

 whether a community has a good water supply? 



4. Write a paragraph showing how New York City ob- 

 tains pure water. 



5. How are the problems concerned with providing St. 

 Louis with pure water different from those of Los Angeles? 



6. The most dangerous impurity found in water is usually 



7. Write a paragraph showing the things which one must 

 consider in obtaining a supply of pure water in a rural 

 district. 



8. , is commonly used in the sterilization of water 



supplies. 



9. When water contains a large amount of suspended 



material it is removed by a process called In this 



process a substance which is (soluble, insoluble) is 



formed chemically in the water. As this settles to the bot- 

 tom it removes the . 



10. Write a paragraph showing how pure water is ob- 

 tained in your community. 



TOPIC 3. USING WATER IN THE HOME AND COMMUNITY 



SUGGESTED PROBLEMS AND QUESTIONS 



1. How is water distributed and handled in your 

 home? What causes the pressure back of the 

 water? How do faucets work? What is the 

 purpose of a water trap? 



2. How does water enable us to get rid of sew- 

 age? What are the dangers of improper sew- 

 age disposal? 



3. What are the modern methods employed for 

 sewage disposal? How is sewage disposed of 

 in your community ? 



SUGGESTIONS AND HELPS FOR STUDY 

 1. In connection with the first problem make a 

 personal examination of the various devices employed 

 to distribute and control water in your home and your 

 schoolhouse. 



2. Keep in mind that the problem of sewage dis- 

 posal is closely related to the problem of water supply. 



3. Make a survey of your local community to de- 

 termine whether garbage, sewage, and human wastes 

 are disposed of in a sanitary way. 



4. Study the following words and see whether they 

 are new to you. 



antiseptic a substance that prevents the growth of 



harmful organisms. 

 septic producing decay through the action of certain 



kinds of bacteria. 



EXPERIMENTS OR DEMONSTRATIONS WHICH WILL 



HELP ANSWER THE PROBLEM QUESTIONS 

 Experiment 45. What are the factors that influence 

 pressure in a water supply system? 



Secure an old tin pail or a gallon can and punch a 

 series of holes in it, beginning near the bottom and spacing 

 them evenly toward the top. Fill the pail with water and 

 observe it as the water flows from the different openings. 

 Record the results of this experiment in your notebook, 1 



1 See workbook, p. 26. 



