602 HOW DOES MAN CONSERVE HIS RESOURCES? 



Review Summary 



Test your knowledge of the unit by: (1) rechecking on the survey ques- 

 tions; (2) performing all the assigned exercises; (3) checking with the teacher 

 your answers on the tests and trying again the parts you missed; (4) making 

 an outline of the unit for your workbook. 



Test ox Fundamental Concepts 



In a vertical column under the heading CORRECT .write numbers of all statements you 

 believe are true. In another column under INCORRECT write numbers of untrue statements. 

 Your score equals right answers X 3|. 



I. Trees protect the soil (1) by having a mat of roots which holds 

 water ; (2) b} r shedding leaves which form humus : (3) by shading the 

 ground, thus preventing evaporation of water; (4) bj^ preventing 

 erosion. 



II. Wood is used (5) for making this book; (6) for fuel; (7) for 

 making rayon ; (8) for making silk. 



III. Some of the enemies of the forest are (9) man; (10) fire; 

 (11) weeds; (12) insects. 



IV. Some methods of conservation of forests are: (13) thinning 

 the present forest area ; (14) replanting depleted area ; (15) building 

 of National Parks; (16) use of tree surgery. 



V. Conservation of animals which form part of our food is seen 

 (17) in the artificial propagation of the fresh- water mussel ; (18) in 

 transplanting clams and oysters from the eastern to the western 

 coast; (19) in the artificial propagation of salmon; (20) in removing 

 restrictions against catching fishes during their breeding season. 



VI. Conservation of birds is seen (21) in the extermination of 

 the passenger pigeon ; (22) in keeping of cats ; (23) in the establish- 

 ment of bird sanctuaries ; (24) in the passing of laws to protect 

 migratory birds. 



VII. Wild mammals are being conserved : (25) by the establishment 

 of national parks and game preserves ; (26) by the establishment of 

 breeding farms ; (27) by game laws which limit shooting of many 

 animals to certain seasons of the year ; (28) by hunting of mountain 

 lions and other predatory animals. 



VIII. Conservation is being applied to man (29) through health 

 examinations and follow-up work ; (30) partly by means of the U. S. 

 Public Health Service and its supervision ; (31) in the reduction of 

 hours of labor with more time for play; (32) through the establish- 



