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exam 3--online
6
| Question | Answer |
|---|---|
| Which of the following magmas has the highest viscosity? | high silica content, low temperature |
| Which plate boundaries are most likely to form mountains? | convergent |
| Which type of convergent plate boundary is most likely to have mountains, but not volcanoes? | continent-continent |
| How many active volcanoes are there on earth? | more than 1,500 |
| Where is the "Ring of Fire" located? | around the Pacific Ocean |
| What type of volcanoes form the Hawaiian Islands? | shield volcanoes |
| How many people live within danger zone of active olcanoes on earth? | about 500,000 |
| What is the most important factor used to determine the volcanic explositivy index of an eruption? | Volume of erupted material |
| How much of Mount St. Helens was blown off during the 1980 eruption? | 400 meters |
| Where was the largest documented volcanic eruption on the continental US? | yellowstone |
| This material ejected from an erupting volcano includes airborne particles of all sizes? | tephra |
| This large volcanic eruption generated so much ash that global temperatures cooled by about .5*C for the two years following the event? | mount Pinetubo |
| What kind of volcano is Mount St. Helens? | stratovolcano |
| Which kind of volcano would have the shortest lifespan? | cinder cones |
| What material compromises most mountains? | crustal rocks |
| What is the balance between topography and the thickness and composition of the underlying material? | isostasy |
| What hazards are commonly associated with volcanic eruptions? | -poisonous or otherwise deadly gases -pyroclastic flows -lava flows -lahars |
Created by:
cbalaban