Answer the questions using the information in the following Web page:
1. Define tephra.
2. Is tephra more commonly produced by mafic or felsic magmas?
3. Define pyroclastic rock. (Click on link for additional information)
4. Which type of pyroclast can be transported the longest distances from a vent?
Select the "Ash" link on the "Tephra" page to answer the following questions:
5. List the three mechanisms of volcanic ash formation.
6. Define tuff. (Click on link for additional information)
7. Give the size ranges of ash, lapilli, and bombs/blocks.
8. Describe ash formation.
9. Define phreatomagmatic eruption. (Click on link for additional information)
10. Name a tuff cone in Hawai'i.
Select the "Lapilli" link on the "Tephra" page to answer the following question:
11. Describe the formation of lapilli.
Select the "Volcanic bomb" link on the "Tephra" page to answer the following questions:
12. Describe the formation of volcanic bombs.
13. Explain why different types of volcanic bombs form.
Select the "Volcanic blocks " link on the "Tephra" page to answer the following question:
14. Describe the formation of volcanic blocks.
Answer the questions using the information in the following Web page:
15. List the principle components in volcanic gas. (See "Composition" section)
16. Describe cinder.
Select the "vesicles " link on the "Cinder" page to answer the following question:
17. Describe vesicle formation.
Select the "pumice " link on the "Cinder" page to answer the following question:
18. Describe pumice formation.
Select the "scoria " link on the "Pumice" page to answer the following question:
19. Give the relationship between scoria and cinder.
20. Describe Pele's hair formation.
Select the "Pele's tears " link on the "Pele's Hair " page to answer the following question:
21. Describe Pele's tears formation.
Select the "Limu o Pele " link on the "Pele's Hair " page to answer the following question:
22. Describe Limu o Pele formation.
Go to this web site and compare the information with the previous site. Note the different block size range.