QUESTION 6 Chapter 3.2. Table 3.2. What does the Volcanic Explosivity Index (VEI

Question

QUESTION 6 Chapter 3.2. Table 3.2. What does the Volcanic Explosivity Index (VEI) tell you about a volcanic eruption? a. A description of how explosive it was b. The volume of pyroclastic materials that were erupted .The height of the cloud column erupted All of the above QUESTION 7 Chapter 3.2.1. What is the difference between magma and lava? a None, the two terms can be used interchangeably Magma is melted rock beneath the surface, while lava is melted rock on the surface. C Magma is basalitic whereas lava is peridotite. OMagma is basaltic whereas tava peridotite. Od Magma is what is produced at mid-ocean ridges, while lava is what is produced at subduction zones. QUESTION 8 Chapter 3.2.1. True/False: Magmas like rhyolite with high Siozcontent tend to have a high viscosity (resistance to flowl, while magmas like basalt with low sio2content tend to have a low viscosity and flow very easily True False

Explanation / Answer

6)d

volcanic explosivity index measure the amount of ash produced, height of the cloud formed after erruption and the duration of eruption.

7)b

it is the molten rock beneath the earth surface when it came out and flow on earth surface it is termed as lava.

8) true

silicate chains in the basaltic lava is less and its viscosity is low so that it can flow easily and rises rapidly due to its fluidity.

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