A woman makes breakfast. Correctly identify each scenario as a physical change, chemical change or no change has occurred. (5 points)

Question

Chemical Change Physical Change No Change Occurred
She mixes some eggs with a little milk in a bowl.

She begins cooking eggs

She puts some toast in the toaster.

The butter she places on the toast melts.

The toast starts burning.

Answer 1

Here is the classification of each scenario:

1. She mixes some eggs with a little milk in a bowl. - No Change Occurred (The mixture can be separated, and no new substances are formed.)

2. She begins cooking eggs. - Chemical Change (Cooking causes irreversible changes in the proteins and structure of the eggs.)

3. She puts some toast in the toaster. - No Change Occurred (No chemical or physical change is happening to the toast yet; it's just placed in the toaster.)

4. The butter she places on the toast melts. - Physical Change (The melting of butter is a physical change as it can be reversed; the butter can solidify again.)

5. The toast starts burning. - Chemical Change (Burning is a chemical process that produces new substances, such as carbon and smoke.)

So, the final categorization would be:

• Chemical Change: She begins cooking eggs, The toast starts burning.
• Physical Change: The butter she places on the toast melts.
• No Change Occurred: She mixes some eggs with a little milk in a bowl, She puts some toast in the toaster.