SUPPLEMENTARY MATERIALS 



169 



FIG. 284. COMMON ENERGY TRANSFORMERS 



4. Something of the world's supplies of natural en- 

 ergy, such as running water, coal, oil. 



5. An intelligent attitude regarding our obligation to 

 conserve and use carefully the present supplies of 

 natural energy. 



TEST OF MASTERY OF THE TOPIC 



In your notebook complete the statements, answer the 

 questions, and comply with the instructions. 



1. Name the four types of water wheel. 



2. Show how the light and heat energy of an electric- 

 light bulb came originally from the sun. 



3. What devices are used by man to change electrical 

 energy into light and heat energy? 



4. How do coal and oil possess energy? 



5. Chemical energy is changed into electrical energy in 

 the battery and the battery. 



6. Figure 284 shows several devices which bring about 

 energy changes. Each device is designated by a letter. Write 

 the letters, and after each letter write the kind of energy 

 change represented by that device. 



7. Name four types of energy change. 



8. What happens to energy which has been used ? 



9. Name at least seven sources of natural energy. 



10. Complete the following statement as a general concept 

 which you have gained from the study of this topic. 



All energy comes from the It is transformed by 



man through such devices as 



SUPPLEMENTARY MATERIALS 



Reading suggestions 



Burns, The Story of Great Inventions (Harper) 

 Bond, On the Battle Front of Engineering (Century) 

 Collins, The Amateur Mechanic (Appleton) 

 Gibson, The Romance of Scientific Discovery (Lip- 



pincott) 



Parkman, Conquests of Invention (Century) 

 Collins, The Boy's Book of Experiments (Crowell) 

 Williams, How it Works (Nelson) 

 Quennell, M. and C. H. B., Everyday Life in the New 



Stone, Bronze, and Early Iron Ages (Putnam) 

 Holland, Historic Inventions (Macrae- Smith) 

 lies, Leading American Inventors (Holt) 

 Williams, The Romance of Modern Engineering (Lip- 



pincott) 

 Bock, What Makes the Wheels Go 'Round (Mac- 



millan) 

 Darrow, The Boys' Own Book of Great Inventions 



(Macmillan) 



Collins, Experimental Mechanics (Appleton) 

 Andrade, Engines (Harcourt) 

 Hawks, The Boys' Book of Remarkable Machinery 



(Dodd) 



Wilkins, Marvels of Modern Mechanics (Dutton) 

 Pupin, Romance of the Machine (Scribner) 

 General Motors Co., Research Division, When the 



Wheels Revolve; Diesel, the Modern Power; Chem- 

 istry and Wheels 



Reports which may be prepared 



1. The early history of the lever 



2. Building of the pyramids 



3. The use of machines on the farm 



4. The use of machines in the home 



5. Machines in building skyscrapers 



6. The invention of the sewing machine 



7. McCormick and the reaper 



8. Harnessing Niagara Falls 



9. The development of water power 



10. Future sources of energy 



11. Harnessing the energy of the tides 



12. Harnessing the energy of wind 



13. The construction and uses of dams 



14. Some fancies in perpetual motion 



15. The story of weights and measures 



16. The Diesel engine as a source of power for au- 

 tomobiles and airplanes 



17. Centrifugal force and how we use it 

 ,18. Should we adopt the metric system? 



19. The work of the Bureau of Standards 



Great scientists you should know about 



1. Archimedes 



2. Lord Kelvin 



3. James Watt 



4. Sir Isaac Newton 



5. Rudolph Diesel 



Investigations and things to do 



1. Make a set of levers of the various classes. 



2. Make model water wheels of the various types. 



3. Measure the efficiency of a jack screw. 



4. Construct a wheel and axle and measure its 

 efficiency. 



5. Determine the horse power of your body. 



6. Study the construction of a reaper and binder. 



7. Study the construction of a sewing machine. 



8. Study the construction of a typewriter. 



9. Make a scrapbook of magazine and newspaper 

 clippings related to the materials of this unit. 



