GROUP D. THE LANDS 

 Answer three questions from this group 



8. Some regions, now land, have been sea-bottom, and other regions now sea- 

 bottom, have been land ; give an example of each sort of region, and state 

 the evidences that the change has occurred. 



Distinguish between mantle-rock and bed-rock; name three economic pro- 

 ducts derived from each, giving one important locality from which each 

 product is obtained. 



10. Describe five particulars in which northern United States differs from 

 southern United States as a result of the ice-sheet of the Glacial Period. 

 Locate the boundary between the glaciated and un-glaciated regions, and 

 explain how it is recognized. 



TI. Give an account of some geographic excursion which you have made, stating 

 its purpose and describing what you saw; or describe some laboratory 

 exercise performed, stating the purpose, method, and results of the work. 



12. Define ten of the following terms: weathering, meander, snow-line, canyon, 

 tornado, barometric gradient, cold wave, sand dune, thermometer, spring 

 tide, water table, continental shelf, artesian well, volcano. 



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