THE EARTH
VOLCANOES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Silica
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Aluminum
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Magnesium
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None of these
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Detailed explanation-1: -Magma and Erupted Materials. No matter what type of magma you have, silica is the main ingredient. What determines the type of magma is the percentages of silica and present. Magmas with high silica content have a high viscosity (resistance to flow) and are generally more explosive when eruptions occur.
Detailed explanation-2: -Like solid rock, magma is a mixture of minerals. It also contains small amounts of dissolved gases such as water vapor, carbon dioxide, and sulfur. The high temperatures and pressure under Earth’s crust keep magma in its fluid state.
Detailed explanation-3: -Felsic magma has the highest silica content of all magma types, between 65-70%. As a result, felsic magma also has the highest gas content and viscosity, and lowest mean temperatures, between 650° and 800° Celsius (1202° and 1472° Fahrenheit).