1. Types of Mixtures

2. Mixtures
They are substances held together by physical forces, not chemical and are not chemically combined.
This mean a mixture will keep it’s own identity.
Can be separated by simple physical methods.
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3. Heterogeneous The substances are not uniformly mixed.
Different substances can be seen.
Example: Sand in a glass of water, cookie dough, lucky charms.

4. Homogeneous Uniformly distributed (are evenly mixed)
Particles are very small -- it is difficult to see each substance in the mixture.
Examples: sugar and water, milk, air.
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5. Types of Homogeneous Mixtures
Solutions – Well mixed mixtures that have the same properties throughout. (particles can’t bee seen and don’t settle over time)
Examples:
Colloids – well mixed mixture that has undissolved particles that will not settle over time.

6. Separating Mixtures

7. Physically picking apart a Mixture by hand
Picking apart different substances from a mixture and placing them in different containers or piles

8. Sieving
Using screens of different sizes to separate a mixture into its different sized components.

9. Magnets
Magnetic attraction can be used to separate the metals Iron (Fe), Nickel (Ni), and Cobalt (Co) from a mixture.

10. Filtration
Using filters to separate solid materials from liquids

11. Decanting
Pouring off liquids for solids

12. Evaporation or Boiling
Evaporation or boiling off a liquid separates liquids for dissolved solids

13. Distillation
Separation of 2 liquids with different boiling point temperatures

14. Centrifuge Separates substances of different densities
Solids from liquids
Different density liquids
Blood platelets from blood plasma