TREES 395 



-7 .^> r 



Questions 



1. How is wood obtained? 



2. Name the principal parts of a tree. 



3. Draw a sketch showing the structure of wood. Name the 

 parts. 



4. Why is summer wood darker than the spring wood? 



5. Why does the wood of an oak and a pine become darker 

 after it has been in the trees some years? 



6. What is sap-wood? Why does it rot quicker than the heart- 

 wood? 



7. What are the whitish lines running from the center of the 

 cross-section of an oak tree? 



8. Explain the difference between maple and pine wood. 



9. For what is walnut wood noted? 



10. Describe the principal uses of cedar wood. Why are cedar 

 chests used to store clothing? 



11. For what is hickory wood principally used? 



12. Describe the kind of lumber which comes from an elm tree. 



13. What is an annual ring? 



