Why Does the Magma from Some Volcanoes Flow Smoothly and Relatively

question 2

Multiple Choice

Why does the magma from some volcanoes flow smoothly and relatively peacefully,while the magma from other volcanoes blasts forth violently?

• A) Differences in the chemical and mineral makeup of magmas
• B) Variations in the temperature,water and gas content,and viscosity of magmas
• C) Different geographic positions with respect to plate tectonic setting
• D) All of these are correct
• E) None of these are correct

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Definitions:

Break-even

The point at which revenue received equals the costs associated with receiving the revenue, resulting in no net profit or loss.

Net Operating Income

Earnings before interest and taxes, representing the profit generated from normal business operations.

Sales Dollars

The total monetary value of sales transactions made by a business within a specific period.

Break-even

The point at which total revenues equal total costs, resulting in no profit or loss.