online_quiz2_alt_2010_post

online_quiz2_alt_2010_post - ONLINE QUIZ 2-ALTERNATE...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
ONLINE QUIZ 2--ALTERNATE Volcanoes 1. In general, ___________ will be more likely to erupt explosively. A. a highly viscous magma B. a relatively low viscosity magma C. high-silica magma D. low-silica magma E. both a. and c. 2. Which of the following is the correct order of decreasing magma viscosity due to decreasing silica content? A. basalt – andesite – rhyolite B. rhyolite – andesite – basalt C. andesite – rhyolite – basalt D. basalt – rhyolite – andesite 3. A massive, gently sloping volcano built of successive, basaltic lava flows is a ___. A. cinder cone B. lava dome C. shield volcano D. stratovolcano 4. A layered volcano composed of successive lava and pyroclastic material beds is a ___. A. cinder cone B. composite volcano C. lava dome D. shield volcano 5. A relatively small pyroclastic pile is a ___. A. cinder cone B. lava dome C. shield volcano D. stratovolcano 6. The volcano associated with fluid lava flows, like those on Hawaii, is a ___. A. cinder cone B. lava dome C. shield volcano D. stratovolcano 7. The volcano associated with explosive eruptions, such as those associated with subduction, is a ___. A. cinder cone B. lava dome C. shield volcano D. stratovolcano 8. Which volcano type is a steep-sided, tall mountain present on the overriding continental plate of convergent plate boundaries? A. cinder cone B. composite volcano C. lava dome D. shield volcano 9. A magma's viscosity is directly related to its __________ content. A. iron B. silica C. aluminum
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
D. potassium 10. Rhyolitic (felsic) magma is typically less fluid than basaltic (mafic) magma. True False 11. Why do magmas rise toward the Earth’s surface? A. Magmas are mainly liquid and contain dissolved fluids such as water, most are less dense than the adjacent solid rock and so move upward. B. Most magmas are richer in silica than most crustal and upper mantle rocks, and are more dense than the other rocks in the melting area, and so move upward. C. Magmas are more viscous than solid rocks in the crust and upper mantle, and are more dense than the adjacent rocks, and so move upward. 12. The smallest of the main volcano types are the cinder cones. True False 13. A large depression at the summit of a volcano is called a __________. A. batholith B. caldera C. dike D. fissure 14. Andesitic to rhyolitic lava is characteristically extruded from volcanoes at convergent plate boundaries. True False Deformation, Geologic Structures, Mountains 1. How is “brittle” deformation different from “ductile” deformation? A. Brittle deformation involves folds, whereas ductile deformation involves fractures. B. Brittle deformation occurs in rocks that are hotter, whereas brittle deformation occurs at low temperature. C. Brittle deformation occurs in rocks that are colder, whereas ductile deformation occurs at high temperature.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/29/2012 for the course 460 100 taught by Professor Schlsche during the Fall '09 term at Rutgers.

Page1 / 13

online_quiz2_alt_2010_post - ONLINE QUIZ 2-ALTERNATE...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online