74 



WATER 



Running water in the form of streams and rivers, by carry- 

 ing sand particles, stones, and rocks from high slopes and 



FIG. 34. Deposit left by running water. 



depositing them at lower levels, wears away land at one place 

 and builds it up at another, and never ceases in its work of 

 changing the nature of the earth's surface (Fig. 35). 



FIG. 35. Water by its action constantly changes the character of the land. 



68. Relation of Water to Human Life. Water is one of the 

 most essential of food" materials, and whether we drink much 



