820Interpret 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.Level 2: Identify the chemical and physical properties of matter.Level 3: Distinguish between physical and chemical changes given investigations or situations.

Interpret the results of an investigation to determine whether a physical or chemical

change has occurred.

Key vocabularyPhysical properties

flammabilityPhysical change reactivityChemical propertiesChemical change

Interpret the results of an investigation to determine whether a physical or chemical

change has occurred.I. Physical Properties

A. Size, Shape, Color, Odor, Texture, things that can be observed with senses

B. Change of state, malleability, ductility, conductivity

C. All Physical properties change during a chemical reaction

D. Physical Properties > New Physical Properties

Interpret the results of an investigation to determine whether a physical or chemical

change has occurred.

II. Chemical PropertiesA. Flammability – how easily a substance burnsB. Reactivity – how easily a substance reacts with

othersC. 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

Interpret the results of an investigation to determine whether a physical or chemical

change has occurred.

III. Physical changesA. A change in physical properties without

changing the identity of the substance (paper is still paper)

B. Note phys props. change but not chem. props.

Interpret the results of an investigation to determine whether a physical or chemical

change has occurred.

I. Chemical Changes A. When one or more substance changes

into new substances with new chem. and phys. props.

B. Note Chem. and Phys. props change with a chem. Change

C. Chem. Changes are not reversible by any physical means

1. Is gas, heat, or light given off? If Yes Chemical2. Does the substance maintain its identity? If yes physical3. Are more than 2 physical properties

changed? If yes chemical

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.

Chemical or physical change?