Question

1. What process occurs if there are formation and movement of magma under the earth's
crust?
A flux meiting B. heat transfer C. partial melting D. decompression melting​

Answer 1

Answer:

Explanation:

C. Partial melting

Answer 2

Decompression melting occurs if there are the formation and movement of magma under the earth's crust. (option D)

What is decompression melting?

• The mantle rock of the Earth moves upwards towards a region of lower pressure, due to convection.
• At lower pressure, the melting point decreases. This is so because the melting point is th temperature at which the internal pressure of a material is equal to external pressure.
• Due to this lowering of pressure, or decompression, the mantle melts easily to form magma.
• This type of formation occurs at divergent boundaries of tectonic plates, hot spots, etc.

Therefore, the correct option is D. Decompression Melting.