Learning Target 5a

 (LT5a): Describe the physical and chemical properties of a substance. Classify changes a substance undergoes as physical or chemical changes. ◦ Meets:  Identify examples of physical properties  Identify examples of chemical properties  Differentiate a physical reaction from a chemical reaction ◦ Exceeds:  Given a reaction, I can explain and defend whether or not it is a physical or a chemical reaction

 Physical Properties: are able to observed or measured without changing the identity of the substance.  Examples: ◦ Color ◦ Odor (smell) ◦ Density (mass/volume) ◦ Malleability (ability to bend) ◦ Elasticity (ability to return to its original shape) ◦ Conductivity (ability to flow energy, heat, or electricity) ◦ Insulator (resisting flow of energy, heat, or electricity)

 Only are able to be observed when the identity of the substance is changed  Examples: ◦ Flammability ◦ Reactivity

 Any change which does NOT change the identity of the substance ◦ The same chemicals are still present  Examples: ◦ Mixing ◦ Dissolving ◦ Melting ◦ Heating/cooling

 Any change which results in a NEW substance ◦ New chemicals are created  Evidence of a chemical change: ◦ Color change ◦ Gas production ◦ Temperature change

Change:Physical or Chemical change?..Why? Observations…  Wad:  Tear:  Soak in water:  Burn:

 Identify examples of physical properties?  Identify examples of chemical properties?  Differentiate a physical reaction from a chemical reaction?  Given a reaction, I can explain and defend whether or not it is a physical or a chemical reaction?

Change:Physical or Chemical change?..why? Observations…  Mix Solids:  Add Red Liquid: