QUESTION 11 Chapter 3.2.2. What happens to gasses dissolved in magma as it ascen

Question

QUESTION 11 Chapter 3.2.2. What happens to gasses dissolved in magma as it ascends toward the surface and p O a It increases in temperature O b. It explodes OIt expands and forms bubbles O d it turns into liquid QUESTION 12 Chapter 3.2.2. Box 3.3. What is a pyroclastic flow? O a A turbulent, dense mixture of hot air, ash, and larger fragments that sweep down the sides of volcanoes. ODA slurry-like flow of mud and water that can flow 10s of km from a volcano. O c. A fast-moving lava flow carrying large chunks of rock. O d A very slow-moving lava flow QUESTION 13 Chapter 3.2.2. What is a Caldera? O a A dome of lava that begins to fill up a volcanic crater after the eruption A cave created when a tunnel of lava empties out O C A fast-moving lava flow carrying large chunks of rock O d. A large crater-like depression

Explanation / Answer

11) C .It expands and bubble form

As the pressre and temperature drops due to ascend of magma the trapped aqueous phases trapped are ejected out and forms tiny bubbles .

12) A

A pyroclastic flow is a fast-moving current of hot gas and volcanic matter that moves away from a volcano at very large speed and leads to vocanic hazard

13) D . A large crater like depression

A caldera is a volcanic feature formed by the collapse of a volcano into itself, making it a large, special form of volcanic crater

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