Give 5 example of physical change and 5 example of chemical change
Answer (1)
A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change involves the formation of new substances with different chemical properties. Here are five examples of each:Physical Changes:Melting ice: Water changes from solid (ice) to liquid (water) but remains chemically the same (H₂O).Boiling water: Water changes from liquid to gas (steam) but remains water.Dissolving sugar in water: Sugar disappears into the water, but it can be recovered by evaporating the water.Cutting paper: The paper is divided into smaller pieces, but the paper itself is not changed chemically.Bending a metal spoon: The shape of the spoon changes, but it is still metal. Chemical Changes:1. Burning wood:Wood reacts with oxygen, producing ash, gases, and heat, forming new substances.2. Rusting of iron:Iron reacts with oxygen and water to form iron oxide (rust), a new substance.3. Cooking an egg:The proteins in the egg undergo a chemical change when heated, resulting in a different texture and appearance.4. Baking a cake:Mixing ingredients, heating them, and forming a new, complex substance (the cake).5. Digesting food:The body breaks down food into simpler substances that can be absorbed.
