What Is the Connection Between the Amount of Silica in a Melt

question 27

Multiple Choice

What is the connection between the amount of silica in a melt and how viscous it is?

• A) Higher silica content lowers the melting temperature and since increasing the temperature of a magma decreases viscosity increasing silica content increases viscosity.
• B) Silica forms strong bonds, so higher amounts of silica make for more viscous magma.
• C) Higher silica content means a larger amount of water a magma can dissolve and water decreases magma viscosity, so increasing silica content decreases magma viscosity.
• D) There is no correlation between silica content and magma viscosity.

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Definitions:

Output

The total value of goods and services produced by an economy over a specific time period.

Economies of Scale

The cost advantages that enterprises obtain due to their scale of operation, with cost per unit of output generally decreasing with increasing scale.

Corporate Bureaucracy

The administrative system governing any large institution or organization, characterized by a hierarchy of authority, rigid division of labor, and strict regulations and procedures.

Average Fixed Cost

The fixed costs of production divided by the quantity of output produced, showing the cost of each product unit excluding variable costs.