When Melting Forms Magma

question 18

Multiple Choice

When melting forms magma:

• A) rocks in the source region generally are completely melted
• B) partial melting produces a magma that is more felsic than the source
• C) melting of the mantle generally produces felsic magma
• D) melting of continental crust generally produces mafic magma
• E) none of these

---

Definitions:

Time-Consuming Estimating Method

A method of estimating that requires a significant amount of time to analyze and calculate, often due to its complexity or detail.

Schedule Variance

A project management metric that compares the amount of work performed against the work scheduled.

Earned Value

Earned Value is a project management technique that measures project performance and progress using scope, schedule, and cost measurements.

Planned Value

An estimate of the expected monetary value of the work scheduled to be performed on a project at any given time.