Asked by Kris
Is "sharpening a pencil" more of a physical change than souring of milk, fermenting of grape juice or rusting of iron?
Thanks anyone!
Thanks anyone!
Answers
Answered by
DrBob222
definitely. Sharpening a pencil leaves the lead, the wood, and the eraser in their original formulations. The others you mention changes the composition of the milk, grape juice or iron into something else.
Answered by
Kris
Thanks, Dr. Bob. So are new substances formed in a chemical reaction?
Answered by
DrBob222
yes
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