1. Heterogeneous Mixtures and Separations
Physical Science

2. Types of Heterogeneous Mixtures
Colloid
Particles are suspended
Particles do not settle into layers
Light cannot pass through
Fog, smoke, marshmallow, jello?

3. Types of Heterogeneous Mixtures
2. Suspension
Contains a liquid and a solid mixed together at first
Over time the two phases settle (separate into layers)
Muddy water, sand in water

4. Solution vs. Suspension vs. Colloid

5. Modes of Separation

6. Evaporation
Used to separate a solute that has been dissolved in a solute.

7. Centrifugation
Used to separate suspensions by density

8. Filtration
Used to separate a suspension of two substances by the size of their particles

9. Distillation
Use to separate liquids that dissolve together that have different boiling points

10. Sand and Salt Separation
Salt will dissolve in water, while sand will not.
How can we separate sand from water?
Let’s try this separation in lab.