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820. Interpret the results of an investigation to determine whether a physical or chemical change has occurred. Interpret the results of an investigation to determine whether a physical or chemical change has occurred. Key concepts/skills: Level 1: Define key vocabulary.

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820

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  1. 820 Interpret the results of an investigation to determine whether a physical or chemical change has occurred.

  2. Interpret the results of an investigation to determine whether a physical or chemical change has occurred. Key concepts/skills: Level 1: Define key vocabulary. Level 2: Identify the chemical and physical properties of matter. Level 3: Distinguish between physical and chemical changes given investigations or situations.

  3. Interpret the results of an investigation to determine whether a physical or chemical change has occurred. Key vocabulary Physical properties flammability Physical change reactivity Chemical properties Chemical change

  4. Interpret the results of an investigation to determine whether a physical or chemical change has occurred. • Physical Properties • Size, Shape, Color, Odor, Texture, things that can be observed with senses • Change of state, malleability, ductility, conductivity • All Physical properties change during a chemical reaction • Physical Properties> New Physical Properties

  5. Interpret the results of an investigation to determine whether a physical or chemical change has occurred. II. Chemical Properties • Flammability – how easily a substance burns • Reactivity – how easily a substance reacts with others • A substances chem. props. Going into a reaction change completely and the substance coming out of the reaction has new chemical properties D. Chem Props. > New chem. Props

  6. Interpret the results of an investigation to determine whether a physical or chemical change has occurred. III. Physical changes • A change in physical properties without changing the identity of the substance (paper is still paper) • Note phys props. change but not chem. props.

  7. Interpret the results of an investigation to determine whether a physical or chemical change has occurred. • Chemical Changes • When one or more substance changes into new substances with new chem. and phys. props. • Note Chem. and Phys. props change with a chem. Change • Chem. Changes are not reversible by any physical means

  8. Interpret the results of an investigation to determine whether a physical or chemical change has occurred. 1. Is gas, heat, or light given off? If Yes Chemical 2. Does the substance maintain its identity? If yes physical 3. Are more than 2 physical properties changed? If yes chemical

  9. Interpret the results of an investigation to determine whether a physical or chemical change has occurred. Chemical or physical change?

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