Physical Science by Glencoe
Classification of Matter 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: Color Shape Size Density Melting Point Boiling Point
Chemical Property Characteristic of a substance that indicates whether it can undergo a certain chemical change.
Chemical Properties: Flammable Combustible Reactive (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 ?
Change of one substance in a material into a new substance. 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.
During a chemical change, matter is neither created nor destroyed. 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
A substance is “Pure” made up of one “thing.”
Made up of only one type of atom. 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...
-Particles to small to see - Uniformly spread out - Never settle 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...
- Never settles -Scatters light (Tyndal Effect) Colloid - Never settles -Scatters light (Tyndal Effect)
- Visible particles - Particles will settle Suspension: - Visible particles - Particles will settle