6Physical or Chemical Change? How can you tell?Rusty Nail
7Physical Changes Aluminum foil is cut in half. Clay is molded into a new shape.Butter melts on warm toast.Water evaporates from the surface of the ocean.A juice box in the freezer freezes.Rubbing alcohol evaporates on your hand.
8Chemical Changes Milk goes sour. Jewelry tarnishes. Bread becomes toast.Rust forms on a nail left outside.Gasoline is ignited.Hydrogen peroxide bubbles in a cut.Food scraps are turned into compost in a compost pile.A match is lit.You take an antacid to settle your stomach.Your body digests food.You fry an egg.
9Physical or Chemical Changes? Salt or sugar dissolving in waterThe formation of steel or brass (metal alloys)Inhaling oxygen and exhaling carbon dioxideSource: A Closer Look: Chemical Vs. Physical Change