Which one of the following shows the correct order left to right. of decreasing magma viscosity in order of composition?

Question

Quizplus · Accepted Answer

Magma viscosity decreases with increasing temperature and decreasing SiO2 content. Basalt has the lowest SiO2 content and highest temperature, so it has the lowest viscosity. Rhyolite has the highest SiO2 content and lowest temperature, so it has the highest viscosity. Andesite falls in between the two, so the correct order of decreasing magma viscosity in order of composition is rhyolite, andesite, basalt.

Which One of the Following Shows the Correct Order Left