physical science by glencoe. chapter 9 classification of matter
TRANSCRIPT
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