Physical PropertiesPhysical Properties

Describing MatterDescribing Matter• Knowing the characteristics or Knowing the characteristics or

properties of an object can help you properties of an object can help you identify the object.identify the object.

• There are: There are: • Physical PropertiesPhysical Properties• Chemical PropertiesChemical Properties

Physical PropertiesPhysical Properties Things that describe the object are Things that describe the object are

physical properties.physical properties. Physical properties can also be observed Physical properties can also be observed

or measured without changing the identity or measured without changing the identity of the matter.of the matter.

Examples of physical properties include: Examples of physical properties include: color, odor, size, state, density, solubility, color, odor, size, state, density, solubility, melting point, etc…melting point, etc…

Spotlight on DensitySpotlight on DensityDensity is a very helpful physical Density is a very helpful physical

property.property.Density = mass per unit of volume or Density = mass per unit of volume or

Density = mass/volume Density = mass/volumeDensity is an excellent help in Density is an excellent help in

identifying substances because each identifying substances because each substance has its own density.substance has its own density.

If Density = mass/volumeIf Density = mass/volumeThen mass = volume x density Then mass = volume x density

ororm = v x dm = v x d

• AND volume = mass/densityAND volume = mass/densityororvolume =volume = m m

VV

Physical PropertiesPhysical Properties

Physical propertiesPhysical properties can be observed can be observed without changing the without changing the identity of the identity of the substance.substance.

Physical PropertiesPhysical PropertiesWhat are What are some some examples examples of physical of physical properties?properties?

ShapeShapeMassMassColorColorVolumeVolumeTextureTexture

Physical Properties can be Physical Properties can be observed or measuredobserved or measured

Your senses can be used Your senses can be used to identify some basic to identify some basic physical properties.physical properties.

What are some of these?What are some of these?

Physical Properties can be Physical Properties can be observed or measuredobserved or measured

State is a physical property State is a physical property that you can observe.that you can observe.

What are the three common What are the three common states?states?SolidSolidLiquidLiquidGasGas

Physical Properties can be Physical Properties can be measuredmeasured

Melting and boiling point Melting and boiling point can be measured.can be measured.

How would you describe How would you describe melting point?melting point?

How about boiling point?How about boiling point?

Physical Properties can be Physical Properties can be measuredmeasured

What are What are some other some other physical physical properties properties that can be that can be measured?measured?

StrengthStrengthHardnessHardnessMagnetisMagnetismm

What do physical properties What do physical properties determine?determine?

They determine uses for They determine uses for the item.the item.

Ex.-aluminum for foil, Ex.-aluminum for foil, clean socks, clothes clean socks, clothes match, etc.match, etc.

Physical ChangesPhysical Changes A physical change is a change that affects one or A physical change is a change that affects one or

more physical properties of a substance.more physical properties of a substance. Physical changes do not form new substances! Physical changes do not form new substances!

EX: ice melting or sugar dissolvingEX: ice melting or sugar dissolving Physical changes are easy to undo.Physical changes are easy to undo.