is NOT necessarily the result of a chemical reaction. A hard-boiled egg A fire Steam

A hard-boiled egg is the result of cooking, where the heat denatures proteins in the egg, changing their structure but not chemically transforming them into a new substance. It’s more of a physical change where the egg's original composition remains intact—just firm and cooked! Steam, on the other hand, is water in its gaseous state, and its formation is a phase change caused by temperature increase rather than a chemical reaction. So, while it looks different than liquid water, it's still H2O, just in a different form—like how ice becomes water, but without any chemistry happening!