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17-1 Matter & Its Changes

17-1 Matter & Its Changes. Chemistry The properties of matter & how matter changes. Physical Changes alters form or appearance of matter, does NOT make a new substance stampedes stampedes Chemical Changes a change in matter that produces a new substance with new properties,

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17-1 Matter & Its Changes

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  1. 17-1 Matter & Its Changes

  2. Chemistry The properties of matter & how matter changes. • Physical Changes • alters form or appearance of matter, does NOT make a new substance stampedes stampedes • Chemical Changes • a change in matter that produces a new substance with new properties, • may involve several steps • when chemical bonds between atoms & compounds are formed or broken stampedes made + steps

  3. Evidence for Chemical Reactions“NOT PROOF” Temperature Change Color Change Changes in Properties PRECIPITATE (solid from solution) Gas Production NEW MATERIALS THAT ARE CHEMICALLY DIFFERENT FROM STARTING MATERIALS

  4. Physical or Chemical? • A raw steak is grilled on the barbecue? • Ketchup, mayonnaise, & relish are mixed to make “secret sauce”? • Water is boiled to get ready to cook pasta? • Ham spoils in the refrigerator? • A rock star gets a tattoo on his arm?

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