6 Physical or Chemical Change? How can you tell?Rusty Nail
7 Physical 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.
8 Chemical 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.
9 Physical 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