Name: Folder Number:
VOLCANOES
WEB QUEST
Go to http://www.learner.org/interactives/volcanoes/ and please answer the following questions:
1) What volcano is in the Seattle/Tacoma area currently endangering more than 3 million people?
2) How do volcanoes form?
3) What is the fastest type of lava? The slowest?
Watch the video clip on lava types.
· What does Pahoehoe mean in the Hawaiian language?
· What does “AA” mean in the Hawaiian language?
Click on “Try your hand at melting rocks” and perform the activity. Did you like this activity? Why or why not?
4) Why do volcanoes erupt differently?
Watch the “hot spots” video clip
5) What type of eruptions occurs at separating plates?
6) What are characteristics of basaltic magmas and where do they occur?
7) Describe eruptions that occur at colliding plate boundaries.
8) What is another word for a stratovolcano?
9) What type of plate boundary are you likely to find a stratovolcano?
Click on “use clues about volcanoes to find out where they’re located”.
Select each case file, read about the volcanoes, and then select “information on volcanoes”.
10) How much more magma came out of the Alaskan volcano than Mt. St. Helens?
11) How many people were killed when Pelee erupted? How did one man survive?
12) In Naples, Italy, what are the two volcanic threats that exist?
Click on “judging hazards”
13) List the dangers that exist when a volcano erupts?
14) What is a danger that exists for volcanoes with glaciers on the top?
15) What is tephra?
16) What 2 ways do pyroclastic flows cause damage?
17) What is a lahar and why is it particularly dangerous?
18) If we can predict when volcanoes will erupt, what methods are used?
19) What problems exist about making these predictions?
20) What 4 approaches can be used to deal with volcanic hazards?
21) What percent of Nevado del Ruiz’s residents perished with a volcano erupted and why?
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