Beverage Lab
Orange Juice
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Could you see bits of different materials with
different properties?
Were these bits solid, liquid, or gas?
What are these little solid bits called?
Where does pulp come from?
Did you decide the OJ was homogeneous or
heterogeneous?
Orange Juice
Soda Pop
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What did you see in the soda pop?
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Were these different bits solid, liquid, or gas?
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What kind of gas was it?
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Did you decide the pop was homogeneous or
heterogeneous?
Soda Pop
Bubbles in Soda Pop
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Can you see any bubbles in an unopened
bottle of pop?
When you open it, where does all the fizz
come from?
Where was all the carbon dioxide before you
opened the bottle?
Homogenized Milk
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With your naked eye, did the milk look
homogeneous or heterogeneous?
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What did you see under the microscope?
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Were the different bits solid, liquid, or gas?
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What were these different bits?
Homogenized Milk
Blobs in Homogenized Milk
Shaking breaks the membrane
Homogenization
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After raw milk is
pasteurized, it is forced
through tiny tubes at
high velocity and
pressure to
homogenize it. This
breaks the fat blobs
into smaller blobs that
cannot cluster together
and rise to the top.
http://class.fst.ohio-state.edu/Dairy_Tech/10.0%20Homogenization.htm
Raw versus Homogenized Milk
http://www.foodsci.uoguelph.ca/dairyedu/homogenization.html
… like Oil and Water.
Skim versus Homogenized Milk
Hmmm…Shaking
separates fat
from milk …
What if we shook a
coffee creamer?
Could we make
butter?
Don’t Forget
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Title Pages
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Mixtures and Pure Substances
Homework
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Summary
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Homogeneous versus Heterogeneous
Due TOMORROW
Write a Summary
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Must be done on loose leaf.
Must be well written.
What is homogeneous?
Give one example.
Why is this homogeneous?
What is heterogeneous?
Give two examples.
Explain why each one is heterogeneous.
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Studycast