Read each scenario. Decide whether a physical or chemical change has occurred and give evidence for your decision. The first one has been done for you to use as an example
Chewing food to break it down into smaller particles represents a ___phyicial ______ change, but the changing of starch into sugars by enzymes in the digestive system represents a _______chemical change ____change.
Your friend decides to toast a piece of bread, but leaves it in the toaster too long. The bread is black and the kitchen if full of smoke.
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Answer:
Chemical Change.
Explanation: This is because turning of bread into black colour changes its physical as well as chemical properties too which is marked by change in taste and smell.Also this black mass can not be changed again in into normal bread.
And hence,its smell also cannot be changed and fowl smell continues to come.
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