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Published byConrad Walters Modified over 9 years ago
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Physical and Chemical Changes Unit II—Part 2
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Concept of Change Change: the act of altering a substance
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Physical Change Physical change: a change that occurs that does not change the identity of the substance Melting ice Freezing Kool-aid Tearing paper Dissolving sugar in water
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Chemical Changes Chemical change: a change that occurs causing the identity of the substance to change Burning Digesting food Rusting A chemical change is called a chemical reaction
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Chemical Changes Cont’d Indicators of a chemical change: Production of light Production of heat Production of a gas Color change Formation of a precipitate
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Is it Physical or Chemical? Glass breaking Physical
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Is it Physical or Chemical? Chemical Burning leaves
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Is it Physical or Chemical? Physical Butter melting
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Is it Physical or Chemical? Chemical Fireworks exploding
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Is it Physical or Chemical? Physical Pouring milk on cereal
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Is it Physical or Chemical? Physical Mowing a lawn
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Is it Physical or Chemical? Physical Separating sand and gravel
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Is it Physical or Chemical? Chemical Bleaching hair
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Is it Physical or Chemical? Chemical Frying an egg
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Is it Physical or Chemical? Physical Hammering nails into wood to frame a house
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Is it Physical or Chemical? Chemical Burning toast
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Is it Physical or Chemical? Physical Mixing powdered Kool-Aid with water
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Is it Physical or Chemical? Physical Adding salt to water to gargle
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Is it Physical or Chemical? Chemical Food spoiling
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Is it Physical or Chemical? Chemical Rusting bicycle
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Is it Physical or Chemical? Physical Melting ice cream
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Changes PhysicalChemical
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Properties PhysicalChemical
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