Question

what makes the rocks change anyway​

Answer 1

Answer:

For a rock, water behaves as its salt. Add water into a mantle peridotite and it will melt at a lower temperature because the bonds in the minerals that make up the rock will be disrupted by the water molecule (we call it a "network modifier").

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Answer 2

Answer:

ice but the ambient temperature is below the air temperature. ... Add water into a mantle peridotite and it will melt at a lower temperature because the bonds in the minerals that make up the rock will be disrupted by the water molecule .