Question

Which are physical changes? Select all that apply. Responses cooking egg whites in skillet cooking egg whites in skillet cleaning stains with bleach cleaning stains with bleach cutting cheese with knife cutting cheese with knife curling hair with rollers

Answer 1

Physical changes involve alterations to a substance's physical properties without changing its chemical composition.

Based on the options you've provided, the physical changes are:

Cooking egg whites in skillet: The egg whites undergo a physical change due to heat, transitioning from a liquid to a solid state, but the chemical composition remains the same.

Cutting cheese with knife: Cutting cheese with a knife is a physical change as it alters the shape and size of the cheese without changing its chemical composition.

Curling hair with rollers: Curling hair with rollers involves altering the shape of the hair fibers without changing their chemical composition.

Cleaning stains with bleach involves a chemical process that can break down and remove stains by interacting with the molecules in the stains. This is more of a chemical change than a physical one.