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ARC-Challenge / OHAT_2007_8_12 / Coal is usually found underground, compressed in a layer between other types of…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

Coal is usually found underground, compressed in a layer between other types of rock. Coal is produced by what rock-forming process?

choices

  • crystallization from melted rock
  • formation of sediment from weathering
  • deposition and burial of dead plant matter
  • eruption of volcanic ash followed by settling in a layer

Discussion

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Source and history

upstream_id / Original problem ID
OHAT_2007_8_12
task_id
41773153-4a56-5dea-9015-d27602df5498
task_key
ARC~2dChallenge--test--OHAT~5f2007~5f8~5f12
task_revision_id
1
config / split
ARC-Challenge / test

Official source

initial import