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Metamorphic rock is rock formed under pressure and temperature extremes. When pelitic rock (aluminious rock) is compressed at various temperatures and pressures, different minerals are formed. Figure 1 shows the minerals that are formed when compressing a certain pelitic rock, andalusite.
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Question 1 of 5
1. Question
Question 1:
At which temperature and pressure reading would a scientist be unable to predict which of the three minerals would form?
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Question 2 of 5
2. Question
Question 2:
According to Figure 1, at a pressure of 3000 atm and temperature of 500 C, which mineral will most likely form?
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Question 3 of 5
3. Question
Question 3:
As the depth increases, so does the force of pressure on forming rocks. According to this information and the data presented in Figure 1, which rock would one expect to find on Earth’s surface, at a temperature of 825 C?
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Question 4 of 5
4. Question
Question 4:
According to the passage, which of the following minerals would be considered a pelitic rock?
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Question 5 of 5
5. Question
Question 5:
At a depth of 12 meters below the surface, a geologist calculates the average pressure to be 6000 atm. He concludes that at this depth, one is most likely to find sillimanite. Is he correct in his conclusion?
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