1. Biology
Chapter 6.3
Mixtures

2. Mixtures Two or more substances combined
Are physical changes, chemical properties do not change as in forming compounds

3. Mixtures Some mixtures in the body are: Blood Sweat Saliva Tears
Cytoplasm

4. Mixtures
Can be separated by filtering or other physical means (evaporating of the water)
Can be homogenous (same all over, 14kt gold) or heterogenous (parts are different, marble)

5. Types of Mixtures Solutions Are homogenous Can’t see separate parts
One substance (solute) is dissolved into another (solvent)
Can’t be separated by filtering

6. Types of Mixtures Solutions Can be a gas – air
Can be a liquid – gasoline
Can be a solid – penny
Which is the solvent, which is the solute? Kool-Aid, Iced-Tea, Salt Water, Used Paint Thinner

7. Types of Mixtures Are heterogeneous Can see separate parts
Suspensions
Are heterogeneous
Can see separate parts
Not all the parts are dissolved
Denser parts settle out to bottom
Blood, river water, paint (that needs to be mixed)

8. Types of Mixtures Colloids Are homogenous Can’t see separate parts
Are large molecule “solutions”
Sol = Liquid at room temperature
Gel = Solid at room temperature

9. Types of Mixtures Colloids Are these sols or gels? Jello Milk
Fingernail polish (on and off nails)
Toothpaste
Orange Juice (with and without pulp)
Hair goop