Question

Silica content determines viscosity. True or false

Answer 1

Magmas that have a high silica content will therefore exhibit greater degrees of polymerization, and have higher viscosities, than those with low-silica contents. The amount of dissolved gases in the magma can also affect it's viscosity, but in a more ambiguous way than temperature and silica content.

Explanation:

Answer 2

it is true that silica content help in determining viscosity.

Explanation:

it is true that silica content help in determining viscosity.

Viscosity is the flow resistance (in contrast to fluidity). Viscosity is mainly dependent on the structure and temperature of magma. Greater SiO2 content (silica) magmas have greater viscosity than smaller SiO2 content magmas (viscosity rises with greater SiO2 density in magma)