physical: breaking glass, boiling water, ripping paper, breaking pencil, condensation, melting butter, cutting grass, smashing watermelon, evaporation, cutting hair, painting wood, erosion, mixing carrots and peas, ice melting, condensation on grass, sublimation, freezing water, bumper dent, breaking sugarcubes, breaking wood, chemical: burning toast, burning wood, acid rain, burning forest, firework exploding, dyeing hair, cooking steak, rusted car, photosynthesis, ripening bananas, oxidation , fungi decomposing tree, sour milk, roasting marshmellows, digesting food, frying an egg, precipitate forms in a test tube, chemical reactions occurring, spoiling food, baking a cake,

Physical and Chemical Changes

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恢復自動保存: ?