1. Matter and Chemical Change
Sec. 1.2
Organizing Matter

2. Matter exists as a solid liquid or gas. Three states of matter!

5. Properties
Properties are characteristics that can be used to describe a substance.
All matter has two types of properties:
Physical
Chemical

6. Physical Properties
Definition: A physical property describes the physical appearance and composition of a substance.
Examples
Colour
Luster: ability to reflect light
Malleability: ability of substance to be molded into another shape
Density: amount per unit size
Hardness: resistance to indentation
Solubility: how much of a given substance will dissolve in a liquid
Conductivity: ability to conduct electrical current
Melting/freezing/boiling point: temp. at which something changes state to a solid, liquid, or gas.

7. Organizing the Properties of Matter
Quick Lab
Page 97

8. Physical Change
Definition: a physical change is a change in the appearance or state of a substance that does not change the composition.
Examples:
Cutting a piece of paper with scissors
Boiling water
Mixing paint
Breaking glass

9. Chemical Properties
Definition: chemical property describes how a substance interacts with other substances (such as acids).
Chemical properties are only observed when a chemical change occurs.
Examples:
Reactions with acids/heat
Ability to burn/break down
Reaction to water
Behavior with air

10. Chemical Change
Definition: chemical change is a change that results when two or more substances react to create a different substance or substances. The new substance (s) have completely different properties from the original ones.
There is a PERMANENT color/odor change, energy released/absorbed, production of a gas & is not easily reversed.
Examples:
Burning a piece of paper
Apple rotting
Mixing baking soda and vinegar
Digestion of food
Metal rusting

11. Pure Substance or Mixture?
Pure substance is made of only one kind of matter and has a unique set of properties that sets it apart from any other kind of matter.
A pure substance may be either an element or a compound.
Element – cannot be broken down any further. (oxygen)
Compound – two or more elements. (water)

12. A mixture is a combination of pure substances. Four types of mixtures
Mechanical mixture: differences are visible
Solution: different substances are not visible
Suspension: a cloudy mixture with tiny particles are held within another, particles can be separated.
Colloid: cloudy mix, but the particles of the suspended mix are so small they cannot easily be separated out.

15. Assignment: Page 104 Complete Sec 1.3 notes using text book
Numbers 2-5, 7, 8
Hand these in!!!
Complete Sec 1.3 notes using text book P