Question

which of these changes is an example of a chemical change?
broken glass
skipping stones on a lake
cooking an egg
mixing frozen peas and carrots

Explanation:

A chemical change produces a new substance with altered chemical composition. Broken glass, skipping stones, and mixing peas/carrots only change shape, position, or physical mixture without forming new chemicals. Cooking an egg denatures proteins, creating irreversible chemical changes in the egg's structure.

Answer:

cooking an egg