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What causes the dissolved gases in magma to expand as the magma reaches the surface?

A. Pressure from surrounding rock increases
B. The gases increase in temperature
C. Pressure from surrounding rock decreases
D. Pressure within the magma increases
Which one is it plz help

Respuesta :

tied200335
The answer is D because When a gas bubble forms, it will also continue to grow in size as pressure is reduced and more of the gas comes out of solution. In other words, the gas bubbles begin to expand. If the liquid part of the magma has a low viscosity, then the gas can expand relatively easily.
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Answer:

THE CORRECT ANSWER IS D

Explanation:

When a gas bubble forms, it will also continue to grow in size as pressure is reduced and more of the gas comes out of solution. In other words, the gas bubbles begin to expand. If the liquid part of the magma has a low viscosity, then the gas can expand relatively easily.

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