1. Classification of matter
Chapter 15
Classification of matter

2. What is matter? Anything that has mass and volume
Matter will be either a PURE substance or a MIXTURE of substances

3. Examples of pure substances: Elements and Compounds
elements are found on the periodic table
EX: carbon, hydrogen, helium
Compounds are made of elements combined together EX: water, salt

4. Mixtures are made of 2 or more substances that can be physically separated
2 types of mixtures:
Heterogeneous mixture is when all parts can be distinguished easily EX: salad, granite, soup

5. 2nd type of mixture
Homogeneous mixture is when the particles are evenly mixed EX: coke, pudding, jello, milk

6. Special types of mixtures
Colloids- word means glue
Homogeneous mixture
Normally Parts of the mixture will not settle out
Example: milk
When light goes through a colloid light is scattered and visible

7. When light is scattered by colloids it is called a Tyndall effect

8. Special mixture…. suspension
Suspensions is a heterogeneous mixture and the particles settle to the bottom
EX: dressing, muddy water

9. Solutions are another name for homogeneous mixtures
Solutions have 2 parts
Solvent- does the dissolving
Solute- what is dissolved

10. Properties of Matter A property is a characteristic
Physical properties are those characteristics you can see or measure and sometimes observe behavior
EX: color, size, mass, texture, magnetic, boiling, freezing, phase change

11. Physical Properties Describe the material
Physical changes are changes in size shape or matter
You can change the size of the material but it is still the same material

12. Chemical Properties
Characteristics of substances that indicate it will change its composition
Ex: flammability
When a substance changes form to another it is called a chemical change

13. The Law of Conservation of Mass
The mass of a substance before a chemical change will equal the mass of ALL substances that remain.
EX: burn wood…. Flames, ashes, gases releases