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Science Bowl Question

📅 NSB MS 2007🎓 MS🔄 Round 4#️⃣ Question 14❓ TOSS-UP📝 Multiple Choice

Which of the following choices is NOT an example of a chemical change:

W) shiny new copper tarnishing to a green color
X) bubbles forming in a solution of vinegar following the addition of baking soda
Y) steel turning red upon heating
Z) iron rusting
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