1. Categorizing our environment

2. Classifying Matter Mixtures
A physical blend of two or more substances.
Examples:
Beef stew, air - mixture of gases

3. Classifying Matter Mixture (Heterogeneous)
Not uniform in composition
One portion of the mixture is different from the composition of another portion
Example:
Soil - sand, silt, clay, decayed material

4. Classifying matter Mixture ( homogeneous)
Completely uniform composition
Components are evenly distributed throughout the sample
Example
Alloys - mixture of metals (brass, steel)
AKA - solution
Example - ammonia, alloys, kool-aid

5. Classifying Matter Mixtures can be separated by physical means
Examples
A spoon can separate beef stew
Sulfur and iron can be separated with a magnet
Tap water is a mixture that can be separated by distillation.
Distillation - a separation techniques based on the physical property of boiling points.
Liquid is boiled to produce a vapor
Then condensed to a liquid leaving impurities behind

6. Categorizing our environment

7. Classifying Matter Elements
Simplest form of matter
Cannot be broken down into anything else
Building blocks for all other substances
Examples
Hydrogen, oxygen, carbon

8. Classifying Matter Compounds
Two or more elements combined through a chemical bond
Can only be separated into simpler substances by chemical reactions
Example
Sugar - C12H22O11

9. Chemical and physical properties of compounds are different from their constituent elements.
Examples
Sugar
Carbon is black
Hydrogen is a gas
Oxygen is a gas
Salt - NaCl
Na (sodium) soft metal that explodes with water
Cl (Chlorine) pale yellow-green poisonous gas

10. Classifying matter review Remember
Substance - all of one kind of matter
Examples: element or compound
Mixture - has more than one kind of material
Examples - two or more compounds or elements that are mixed, not chemically combined

11. Categorizing our environment