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  • Stage 1


    Answer 4 questions correctly in a row.

Clare has a steel wool pad for scrubbing some of her cookware. She notices that rust forms on the steel wool when she leaves it in the sink for too long. She wonders what factors affect how quickly steel wool rusts. She has the following supplies available:
  • a package of four steel wool pads
  • four glass jars with lids
  • tap water
  • salt water
  • vinegar
Using only these supplies, which two questions can Clare investigate with an experiment?
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