416 Introduction to the Study of Science 



Limerock is metamorphosed into marble, sandrock into quartzite, 

 and shale into slate. 



REVIEW QUESTIONS 



1. Compare man and other animals as to natural ability to endure 

 extremes of weather and to avoid dangers. 2. How did primitive 

 man protect himself ? 3. Give reasons why men in ancient times built 

 permanent homes. 4. What were the chief characteristics of the 

 buildings of the early Egyptians ? the Babylonians ? 



5. What characteristics should an ideal building material possess? 

 6. Give reasons why more wood is used in building than any other 

 material. 7. Mention four steps in the transformation of the grow- 

 ing tree to the finished dwelling. 8. What are the chief defects in 

 wood as a building material? How may these defects be partially 

 overcome ? 



9. Mention three classes of stone used for building and an example 

 of each. 10. Show how the durability of stone depends on climate. 



11. Why is sandstone easily quarried and prepared for buildings? 



12. Why is Ohio sandstone in demand? 13. Give an account of the 

 formation of sandstone. 14. Mention several common uses of slate. 

 15. Why is slate easily worked? 16. From what was slate formed? 

 17. Of what is granite composed? 18. What are its characteristics 

 as a building material? 19. In what regions is granite found? 

 20. What relation had granite to the formation of shale and sand- 

 rock? 21. How was granite formed? 22. What is the commercial 

 importance of limerock? 23. In what regions is limerock found? 

 24. How does it appear in the quarries ? 25. What does its stratified 

 character suggest as to its age and manner of formation? 26. In 

 what conditions does sedimentation occur? 27. Why is sedimentary 

 rock stratified? 28. Of what practical importance is stratification 

 in rocks? 29. Explain how the Mammoth Cave was formed. 

 30. What does this show as to the solubility of limerock? 31. How 

 are stalactites formed? 32. What other limestone deposits are 

 made in this way? 33. Give an account of the origin of limestone. 

 34. Under what conditions is limestone metamorphosed? What is 

 formed? 35. Mention some qualities which make marble a desirable 

 building material. 



36. Mention the three main groups of rocks. 37. What was the 

 origin of sedimentary rocks ? 38. What was the origin of metamorphic 

 rocks? 39. Give examples of metamorphie rocks. 40. What are 

 the characteristics of igneous rock? 41. Mention two examples of 

 igneous rocks. 



