Question

A student mixed flour, water, and several other ingredients form bread dough. He then baked it. After it was cooked, he took a bite. Inside his mouth, his teeth crushed the food into small bits. His saliva began to break down the bread into its components. A. Identify and describe FOUR changes of matter in the scenario above. B. Classify Each as a PHYSICAL or CHEMICAL change. *

Answer 1

Answer:

mixing is a physical change, chewing is also a physical change, baking is a chemical change, saliva breaking down food into energy which is also a chemical  change

Explanation:

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Answer 2

Answer:

mixing=physical, chewing=physical, baking= chemical, saliva breaking down food into energy=chemical

Explanation:

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