Geology Quiz: Part 4

What are the factors that determine the melting point of rocks?

• Water content, Density, Pressure, Mineralogy

• Composition, Temperature, Pressure, Water content

• Temperature, Density, Viscosity, Crystallization

• Composition, Pressure, Water content, Mineralogy

What is the process of partial melting in rocks?

• All minerals melt at the same temperature

• Some minerals melt while others remain solid

• Rocks melt completely at high temperatures

• Minerals melt in layers based on their density

What is the key process explaining the creation of magmas under areas of thin lithosphere?

• Lithostatic pressure

• Buoyancy-driven flows

• Decompression melting

• Fractional crystallization

What is the measure of a liquid's resistance to flow?

• Composition

• Melting point

• Density

• Viscosity

What is the process that rocks of varying composition can arise from a uniform parent magma?

• Fractional crystallization

• Decompression melting

• Magmatic differentiation

• Partial melting

What is the effect of water content on the melting temperatures of mixtures of sedimentary and other rocks?

• Water content increases melting point only in sedimentary rocks

• Water content increases melting point

• Water content decreases melting point

• Water content has no effect on melting point

What is the result of increasing pressure on the melting point of rocks?

• Melting point decreases

• Melting point varies based on mineral composition

• Melting point remains the same

• Melting point increases

What is the process that rock composition changes as it is depleted of the chemical elements that form the crystallized minerals?

• Decompression melting

• Fractional crystallization

• Magmatic differentiation

• Partial melting

What is the process where the less dense melt moves in upward layers and rises to the surface?

• Lithostatic pressure

• Buoyancy-driven flows

• Fractional crystallization

• Decompression melting

What is the process that explains why rocks of varying composition can arise from a uniform parent magma?

• Magmatic differentiation

• Decompression melting

• Partial melting

• Fractional crystallization