2 Physical PropertiesPhysical property is a property that can be observed without changing the identity of the substance.Examples:viscosityconductivitymalleabilityhardnessmagnetismmelting pointboiling pointdensitycolor
3 Physical Properties Hardness Texture Color Odor Taste Temperature Physical properties are used to identify, describe and classify matter.Characteristic of a substance that can be observed (using your senses) without changing the substance into something else.HardnessTextureColorOdorTasteTemperature
4 Examples of Physical Properties Viscosity of a substance is its resistance to flow.Examples: water = low viscosityhoney = high viscosityConductivity is a material’s ability to allow heat to flow.Examples: metal = high conductivity wood = poor conductivity
5 Examples of Physical Properties Malleability of a substance is its ability to be hammered into a thin sheetMelting and Boiling points are the temperatures at which a solid becomes a liquid and a liquid becomes a gas.Density of a substance is the ratio of its mass compared to its volume.
6 Physical Properties to separate mixtures Two common separation methods:Filtration – process that separates materials based on the size of their particles.Distillation – process that separates the substances in a solution based on their boiling points.
7 Physical Change It is a physical change if . . . A change in the appearance, without changing the composition of the material.It is a physical change if . . .It dissolves.Or the substance changes phase.It changes shape or sizeCan be reversible, or irreversibleSubstance may seem different, but the way the atoms link up is the same.
9 Chemical PropertiesChemical property is any ability to produce a change in the composition of matter.Examples of chemical properties . . .flammabilityreactivityMaterial’s ability to burn in the presence of oxygen.How readily a substance combines chemically with other substances.
10 Chemical ChangesChemical changes occur when a substance reacts and forms one or more new substances.You know a chemical change has occurred when . . .A change in color.Production of a gas.Formation of a precipitate.
11 Creating a new chemical product Chemical PropertiesChemical properties are characteristics involved when a substance interacts with another substance to change its chemical make-up.FlammabilityRustingCreating gas bubblesCreating a new chemical productReactivity with waterpH