Question

unit 1, lc2 practice
which of these is an example of a chemical change?
○ snow melting on the sidewalk
○ bananas turning brown as they ripen
○ crumbling a cookie into smaller pieces
○ liquid gold turning into solid gold in a jewelry mold

Explanation:

A chemical change results in the formation of new substances. Snow melting is a physical change (change of state from solid to liquid). Crumbling a cookie is a physical change (only size changes). Liquid gold turning to solid is a physical change (change of state). Bananas turning brown as they ripen involves oxidation reactions (new substances like melanin are formed), which is a chemical change.

Answer:

bananas turning brown as they ripen