Asked by duoduo Aguimarti on Jul 24, 2024
Verified
Which of the following are true of felsic magmas?
A) They tend to have high viscosities.
B) They do not allow gas bubbles to escape easily
C) High gas pressures commonly lead to highly explosive eruptions.
D) All of these
Felsic Magmas
Magmas that are rich in lighter elements like silicon and oxygen, usually linked with explosive volcanic eruptions due to their high viscosity and trapped gases.
High Viscosities
Describes fluids that have a thick or sticky consistency, which resist flow to a greater degree compared to fluids with low viscosities.
Gas Pressures
The force exerted by gas molecules per unit area in a containment or environment.
- Acquire knowledge on how magma and volcanic gases' behavior is impacted by viscosity.
- Acknowledge the tie between the makeup of magma and volcano specifications.
Verified Answer
KC
Karan CheemaJul 31, 2024
Final Answer :
D
Explanation :
Felsic magmas are characterized by high silica content, which leads to high viscosities. This high viscosity prevents gas bubbles from escaping easily, causing high gas pressures that can result in highly explosive eruptions. Therefore, all of the statements are true of felsic magmas.
Learning Objectives
- Acquire knowledge on how magma and volcanic gases' behavior is impacted by viscosity.
- Acknowledge the tie between the makeup of magma and volcano specifications.