334 QUESTIONS. 



olution ? What is meant by the crust of the earth ? In what ways 

 has knowledge of it to great depths been obtained ? 



82 V What is said of the foundation of this crust ? What of its 

 thickness ? What is the proportion of land and water on its surface ? 

 What is said of the elevations on the earth's crust? What of the de- 

 pressions ? What of the shallows of the ocean ? What of bodies of 

 water between certain portions of land ? 



83. What comparison is made between the equatorial bulging and 

 the mountainous elevations ? What between the elevations and de- 

 pressions ? What is said of the ocean near Newfoundland ? What 

 of the general arrangement of the land? What of its divisions? 

 What of the position of the Atlantic and Pacific Oceans ? 



84. What is said of a certain arrangement of the waters noticed by 

 Guyot ? What of the arrangement of the mountains ? 



85. What is said of their relation to the oceans ? What of varia- 

 tions in the arrangements of chains of mountains? What as to their 

 prevailing directions? State in full what is said of volcanoes. What 

 is a plateau ? 



86. What are called lowlands ? Give examples of extensive low- 

 lands. What relations have mountains to plateaus and lowlands? 

 What are table-lands ? Give examples of extensive plateaus. How 

 do these compare in arrangement with what we often see on a small 

 scale ? 



87. State in full what is said of rivers. What is said of lakes ? 

 How do mountains affect the fertility of regions? How are winds 

 produced ? Give what is said of the prevalent winds. 



88. State in full what is said of the influence of mountains on the 

 fall of rain, and the consequent difference between America and Eu- 

 rope. What would have been the condition of North America if the 

 Rocky Mountains were on its eastern side and the Appalachians on 

 the western ? What is said of the circulation of water ? 



89. What is said of systematic currents? What comparison is 

 made in regard to the circulation of water ? What is said of the di- 

 versification of the earth's surface ? What of the treasures in the 

 earth's crust ? 



CHAPTER X. 



90. What is said of the apparent discrepancy between the Scripture 

 account of the creation and the ideas of geologists ? In what sense is 

 the word present used in the title of this chapter ? What are the 

 agents of change in the earth ? 



91. State in full what is said of the aqueous and igneous agencies. 

 Illustrate the influence of different degrees of rapidity in the flow of 

 water on the removal of materials. 



