Physical Science by Glencoe

Chapter 9

Classification of

Matter

Physical Property

Any characteristic of a material that you can

observe without changing the

substances that make up the material.

Physical Properties:

ColorShape Size DensityMelting PointBoiling Point

Chemical PropertyCharacteristic of a substance that

indicates whether it can undergo a certain chemical

change.

Chemical Properties:

FlammableCombustibleReactive(Acidic)(Basic)

Physical Change

A change in the size, shape, or state of

matter of a substance.

(The substances in a material DO NOT

change.)

Examples of physical changes

? ? ? ? ? ?

Chemical Change:

Change of one substance in a

material into a new substance.

(A new substance is produced.)

Law of Conservation of Mass

The mass of all Substances present before a chemical change equals the

mass of the substances remaining

after a chemical change.

L of C of M(cont.)

During a chemical change, matter is neither created nor destroyed.

Matter is divided into

what two categories?

Substance or

Mixture

Substance:

A substance is “Pure” made

up of one “thing.”

Elements:

Made up of only one type of

atom.

Compounds:

Made up of two or more different types of

atoms.

Combined in specific ratios.

H20 = 2 H : 1 0

Mixtures:

Two or more substances with no

definite ratio.

Can be separate by physical means.

Homogeneous

Homo- prefix that means “same” A mixture where all materials looks the

same and individual parts cannot be seen even with a microscope

Another name for this type of mixture is...

Solution:

-Particles to small to see

- Uniformly spread out

- Never settle

Heterogeneous

Hetero- prefix that means “different” A mixture where materials are larger

and can either be seen with a microscope or with the naked eye

There are two types of this kind of mixture...

Colloid

- Never settles

-Scatters light (Tyndal Effect)

Suspension:

- Visible particles

- Particles will settle