Physical Properties Properties of Matter

Physical Properties Physical property is a property that can be observed without changing the identity of the substance. Examples: viscosity conductivity malleability hardness melting point boiling point density color

Examples of Physical Properties Viscosity of a substance is its resistance to flow. Examples: water = low viscosity honey = high viscosity Conductivity is a material’s ability to allow heat to flow. Examples: metal = high conductivity wood = poor conductivity

Examples of Physical Properties Malleability of a substance is its ability to be hammered into a thin sheet Melting and Boiling points are the temperatures at which a solid becomes a liquid and a liquid becomes a gas. Density of a substance is its mass compared to its volume.

Physical Change It is a physical change if . . . A change in the appearance, without changing the composition of the material. Can be reversible, or irreversible Substance may seem different, but the way the atoms link up is the same. Or the substance changes phase. It changes shape or size It dissolves. It is a physical change if . . .

Chemical Properties Properties of Matter

Chemical Properties Chemical property is the characteristic of a substance that is observed during a chemical reaction in which the composition of matter changes. Examples of chemical properties . . . flammability reactivity Material’s ability to burn in the presence of oxygen. How readily a substance combines chemically with other substances.

Chemical Changes Chemical 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. Change in odour. (smell)

What kind of change is it? physical

What kind of change is it? chemical

What kind of change is it? physical

What kind of change is it? physical

What kind of change is it? chemical

What kind of change is it? physical