Ch. 5 Questions

Question 1

1. ________ are usually the most abundant gases emitted during basaltic volcanism.

Chlorine and sodium
Neon and ammonia
Oxygen and nitrogen
Water and carbon dioxide

Answer 1

Water and carbon dioxide

Question 2

2. Shield volcanoes are formed from _________.

granite
alternating pyroclastics and lava flows
pyroclastics
basalt

Answer 2

basalt

Question 3

3. Mauna Loa on the island of Hawai’i is a _________.

shield volcano
cinder cone
stratovolcano
composite cone

Answer 3

shield volcano

Question 4

4. Which of the following best describes seamounts and islands of the deep ocean basins?

Huge granite batholiths intruded beneath the ocean floor
Piles of basaltic lava flows built up from the ocean floor by multiple summit and flank eruptions
Andesitic pyroclastic rocks submerged when the mountains sank below sea level
Domed gabbro intrusions and massive, submarine, rhyolitic, pyroclastic cones

Answer 4

Piles of basaltic lava flows built up from the ocean floor by multiple summit and flank eruptions

Question 5

5. Cinder cones are formed from_________.

granite
alternating pyroclastics and lava flows
pyroclastics
andesite

Answer 5

pyroclastics

Question 6

6. Which natural phenomenon occurs for many years after major explosive volcanic eruptions such as Tambora and Pinatubo?

Heavy falls of volcanic ash within 100 kilometers of the volcano
Climatic warming
Climatic cooling
Brilliantly colored sunrises and sunsets

Answer 6

Climatic cooling

Question 7

7. Which of the following is associated with deep mantle hot spots?

Vesuvius and the other volcanoes of Italy
The volcanoes of Hawaii and Quaternary activity of Yellowstone National Park
The very young cinder cones scattered across the southwestern United States
Mount St. Helens and other volcanoes of the Cascade Mountains

Answer 7

The volcanoes of Hawaii and Quaternary activity of Yellowstone National Park

Question 8

8. The Columbia Plateau formed from ________.

volcanic ash deposits
a laccolith
flood basalts
a shield volcanoz

Answer 8

flood basalts

Question 9

9. The ________ ocean basin is rimmed by the most subduction zones.

Atlantic
Indian
Pacific
Arctic

Answer 9

Pacific