Question

what do these two changes have in common? baking cookies deep - frying chicken select all that apply. both are only physical changes. both are chemical changes. both are caused by heating. both are caused by cooling.

Explanation:

1. Analyze "baking cookies": Baking involves chemical reactions (like Maillard reaction, starch gelatinization) and uses heat. It's a chemical change (new substances form) and caused by heating. It's not a physical change (physical changes don't form new substances) or caused by cooling.
2. Analyze "deep - frying chicken": Deep - frying also involves chemical reactions (like Maillard reaction in the chicken's surface) and uses heat. It's a chemical change and caused by heating. It's not a physical change or caused by cooling.
3. Evaluate the options:

• "Both are only physical changes": Incorrect, as both are chemical changes.
• "Both are chemical changes": Correct, because new substances are formed during baking and deep - frying (e.g., browning, texture changes due to chemical reactions).
• "Both are caused by heating": Correct, as baking uses an oven (heat) and deep - frying uses hot oil (heat).
• "Both are caused by cooling": Incorrect, as both processes use heat, not cooling.

Answer:

B. Both are chemical changes, C. Both are caused by heating (assuming the options are labeled as A: Both are only physical changes, B: Both are chemical changes, C: Both are caused by heating, D: Both are caused by cooling)