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GIA Diamonds and Diamond Grading: Assignment 3 Questionnaire with Answers Rated A

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What layer of the earth includes continental and oceanic components? A. Core B. Crust C. Transition zone D. Upper mantle Where do most superdeep diamonds form? A. Pipes B. Outer core C. Ocean

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GIA Diamonds and Diamond Grading: Assignment 3 Questionnaire
with Answers Rated A
What layer of the earth includes continental and oceanic
components?
A. Core
B. Crust
B. Crust
C. Transition zone
D. Upper mantle
Where do most superdeep diamonds form?
A. Pipes
B. Outer core D. Lower mantle
C. Oceanic crust
D. Lower mantle
How does metasomatism attect lithospheric diamond for-
mation?
A. Supplies heat
C. Removes oxygen
B. Transports rock
C. Removes oxygen
D. Provides hydrogen
What causes the movement of the earth's plates?
A. Volcanism
B. Subduction D. Mantle convection
C. Metasomatism
D. Mantle convection
How are igneous rocks formed?
A. In gas
B. By erosion C. From a molten state
C. From a molten state
D. By heat and pressure

What does basaltic rock change to in the mantle during
subduction?
A. Eclogite
1/3

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