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Based on the diagram below, which letter indicates a place where new plate material is forming?

  1. At the boundary of the continent and ocean basin
  2. In the middle of the ocean basin
  3. At the boundary where the two plates are pulling apart
  4. No new plate material is forming anywhere shown in the diagram.
Distribution of Responses
Chart showing distrubtion of responses for Item PT041001
Students Responding Correctly
Group Correct Total Percent
Overall 1535 3156 49%
  6–8 963 2038 47%
  9–12 562 1105 51%
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