362 FIRST YEAR SCIENCE 



Describe the life history of a river. 

 What peculiarities have rivers of dry climates? 

 Describe some of the accidents which are liable to happen during 

 a river's history. 



How are alluvial cones and fans formed ? 

 Where and how do rivers build deltas? 

 What have been the effects of rivers upon history ? 

 Describe the four great rivers of the United States. 



