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ARC-Challenge / ACTAAP_2013_5_17 / Which is an example of a physical change?

Problem

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

question

Which is an example of a physical change?

choices

  • breaking an object into smaller pieces by using a hammer
  • allowing an iron chain to remain in salt water until it rusts
  • heating a brown substance until it changes into a gray powder
  • reacting vinegar and baking soda to make white foam and a gas

Discussion

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Source and history

upstream_id / Original problem ID
ACTAAP_2013_5_17
task_id
dc7afa7e-bb6c-5c66-84df-27386e75afce
task_key
ARC~2dChallenge--test--ACTAAP~5f2013~5f5~5f17
task_revision_id
1
config / split
ARC-Challenge / test

Official source

initial import