Question

which event that takes place while baking cookies is an indicator of a physical change?

chocolate chips melting
ingredients baking together in the oven
all events are indicators of a chemical change
smell of cookies wafting from the oven

Answer 1

The event that takes place while baking cookies that is an indicator of a physical change is **chocolate chips melting**. Melting is a physical change because it involves a change in the state of matter (from solid to liquid) without altering the chemical composition of the chocolate chips. The other events listed (ingredients baking together in the oven and the smell of cookies wafting from the oven) are indicators of chemical changes happening during the baking process.