FORMS OF MATTER. 



which seems to you most natural, and most in accord 

 with your observations concerning them. What character- 

 istic are you using as the basis of the division you have 

 chosen? Should a first division, such as this, use the 

 more fundamental or the less fundamental characteris- 

 tics? Why? 



Can you select qualities from your list that would allow 

 you to use in turn each of the other methods of division 

 indicated by the brackets. (Note that any classification 

 involves both likenesses and differences; for example, 

 brackets "a" means that i, 2, 3, 4, and 5 have some 

 qualities or absence of quality in common, and are in 

 this respect different from 6.) 



What characteristics, that you have discovered, should 

 be written after the numerals in the following skeleton 

 classification, in order to express the steps? 



Sand. 



. . Pebbles. 



FORMS OF && ..Crystals. 



MATTER '- Shells. 



i Plants. 



2 Animals. 



Illustrate as many other ways of grouping these six 

 types of objects as you can. Notice how the basis of 

 classification (i. e., the quality that you choose to use 

 first) determines your classification. In the above dia- 

 gram read successively the characteristics (the 2's) 

 leading to animals, and see if such a classification implies 

 at least a partial definition of the objects classified. 



