Multiple Choice
Why don't diamonds turn back to graphite once they reach Earth's surface?
A) Diamonds are too hard to undergo reactions.
B) Temperatures need to be lower than those found on Earth.
C) There is not enough heat on the surface of the earth to drive the reverse reactions.
D) Humans harvest diamonds before they can turn back to graphite.
Correct Answer:

Verified
Correct Answer:
Verified
Q2: What grade of metamorphism occurs at a
Q3: Which of the following pairs of index
Q4: A gneiss containing kyanite and sillimanite most
Q5: Andalusite, kyanite, and sillimanite are described as
Q6: A coarse-grained weakly foliated metamorphic rock composed
Q8: Which of the following pairs of index
Q9: What information can be concluded by the
Q10: What grade of metamorphism occurs at a
Q11: Which mineral is not a polymorph of
Q12: When trying to recognize if a rock