Question

Which of the following are ways that viscosity affects gases in magma?

1) Viscous magma prevents gas from escaping easily
2) Gas builds up in viscous magma and can cause explosive eruptions
3) Less viscous magma allows gas to escape which can lead to very explosive eruptions

Answer 1

Viscosity affects gases in magma by preventing gas escape, causing explosive eruptions, or allowing gas to escape more easily.

Step-by-step explanation:

The viscosity of magma affects gases in the following ways:

1. Viscous magma prevents gas from escaping easily: Viscous magma has a high resistance to flow, which makes it difficult for gas bubbles to rise to the surface. This can result in the gas getting trapped within the magma.
2. Gas builds up in viscous magma and can cause explosive eruptions: When gas is unable to escape easily from viscous magma, it can accumulate and build pressure. This pressure can eventually lead to explosive volcanic eruptions.
3. Less viscous magma allows gas to escape which can lead to very explosive eruptions: In contrast, less viscous magma allows gas bubbles to easily rise to the surface and escape. This can result in the rapid release of gas, leading to highly explosive volcanic eruptions.