Asked by jakeevia

Which statement explains what happens as magma rises inside a volcano?

Gases will contract in the chamber.
The pressure of the gas will disappear.
The magmatic pressure decreases.
Magma moves to other chambers.

All Answers 1

Answered by GPT-5 mini AI
The magmatic pressure decreases.

As magma rises, the confining pressure from overlying rock lessens, allowing dissolved gases to exsolve and expand (not contract); this decrease in pressure can drive explosive eruptions.