FREE AND STUDY GAMES ABOUT GEO QUIZ 6 EXAM

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FREE AND STUDY GAMES ABOUT GEO QUIZ 6 EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -68 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Small basaltic cones built during one short, eruptive episode

Answer:

cinder cones

Question 2: Crater Lake in Oregon actually occupies a caldera, not a crater.

Answer:

T

Question 3: Cinder cones ________.

Answer:

All of these (have very steep slopes, are usually less than 300 meters high, consist largely of pyroclastics) Question 4: Which one of the following statements concerning volcanic blocks and bombs is TRUE?

Answer:

Bombs are ejected as magma lumps; blocks are ejected as solid fragments.

Question 5: A ________ is the largest discordant body of intrusive, igneous rock.

Answer:

batholith Question 6: Which one of the following best describes volcanism in the Cascade Range, northwestern United States?

Answer:

related to plate subduction Question 7: The Columbia Plateau in the northwestern United States is an excellent example of

________.

Answer:

flood basalts

Question 8: Volcanic bombs originate ________.

Answer:

as erupted magma blobs that partly congeal before falling to the ground Question 9: Most of the active volcanoes on Earth are located in a belt known as the ________.

Answer:

Ring of Fire Question 10: Large, fairly steep-sided cones composed of lavas and pyroclastic layers

Answer:

composite/stratovolcanoes Question 11: ________ tend to increase the explosive potential of a magma body beneath a volcano.

Answer:

High viscosity and dissolved gas Question 12: Small amounts of water can lower partial melting temperatures in silicate rocks.

Answer:

T

Question 13: Ash and lapilli are different sized pyroclastic particles.

Answer:

T Question 14: Which one of the following statements concerning cinder cones is FALSE?

Answer:

The cinders and other pyroclastic particles are consolidated into welded tuff.

Question 15: The ________ ocean basin is rimmed by the most subduction zones.

Answer:

Pacific

Question 16: The most violent volcanic activity is associated with ________.

Answer:

composite cones

Question 17: The big volcanoes of Hawaii

Answer:

shield volcanoes Question 18: The 1943 eruption of Paricutin in Mexico was characterized by ________.

Answer:

cinder cone building and basaltic lava

Question 19: Mount Pelée on Martinique is an example of a ________.

Answer:

composite volcano Question 20: A ________ volcano is a very large, gently sloping mound composed mainly of basaltic lava flows.

Answer:

shield

Question 21: Which kind of volcanism is typical of mid-oceanic ridge systems?

Answer:

submarine; basaltic lava flows Question 22: A ________ is a near surface, intrusive igneous rock body that results from local inflation of a horizontal sill.

Answer:

laccolith Question 23: Which one of the following shows the correct order (left to right) of decreasing magma viscosity?

Answer:

rhyolite, andesite, basalt Question 24: Spreading center volcanism most generally produces rocks that are ________.

Answer:

basaltic in composition Question 25: The active Hawaiian volcanoes are situated directly above a major boundary between two of the Earth's largest tectonic plates.

Answer:

F Question 26: Which type of basaltic lava flow has its surface covered with sharp-edged, angular blocks and rubble?

Answer:

aa Question 27: Most basaltic magmas are believed to form by partial melting of granite in the lower crust and upper mantle.

Answer:

F