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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?
Does steel wool rust more quickly when stored in a jar with water or in a jar without water?
Does steel wool rust more quickly when in salt water or in tap water mixed with baking soda?
Does steel wool rust more quickly when stored in a jar of water with a lid or in a jar of water without a lid?
Does steel wool rust more quickly when stored in a plastic jar of water or in a glass jar of water?
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