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ARC-Challenge / Mercury_414504 / Students have a rock sample that may contain the mineral hematite. They know…

Problem

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question

Students have a rock sample that may contain the mineral hematite. They know that hematite has a red or rusty streak. How can the students determine the color of the streak in the rock sample?

choices

  • use a rock with the known mineral to strike the sample
  • rub the sample on a piece of unglazed clay tile
  • use a file to break off a piece of the sample
  • scratch the sample with an iron nail

Discussion

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Source and history

upstream_id / Original problem ID
Mercury_414504
task_id
4f0e9137-bce7-532e-9bcc-a9aa2f11fd11
task_key
ARC~2dChallenge--test--Mercury~5f414504
task_revision_id
1
config / split
ARC-Challenge / test

Official source

initial import