1) Physical change a) Solving sugar in water. b) Peeling potatoes. c) Burning wood. d) Boiling water. e) Corrotion of an iron fence. f) Photosyntesis of plants. 2) Chemical change a) Frying chicken. b) Turning liquid water into ice cubes. c) Mixing the ingredients for a salad. d) Solving salt in water. e) Explode some gun powder. f) Doing exercise. 3) Mixture a) Air b) Hydrogen c) Pure water d) Sand e) Soup f) Sulfuric acid 4) Pure substance a) Gold b) Hydrochloric acid c) Ammonia d) Sea water e) Oil f) Air 5) Homogeneous mixture a) Sea water b) Oil with water c) Lemonade d) Wood e) Steel f) Salad

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