Transcript Integrating-STEM-in-Middle-Level-Food-Science

Integrating STEM in Middle
Level Food Science
Peggy Templeton M.Ed. NBCT
Kathryn Wilkie NBCT
Central Kitsap School District
Contact Information
• Peggy Templeton
• [email protected]
• http://moodle.cksd.wednet.edu/
View Secondary Schools, to CKJH
and click on Templeton
• Kathryn Wilke
• [email protected]
Central Kitsap Schools
PO Box 8
Silverdale, WA 98383
Scientific Literacy
• Use scientific knowledge in physics,
chemistry, biological sciences, and
earth/space sciences
• process to understand the natural
world but to participate in decisions
that affect life, health, earth, and
environment
Technology Literacy
• Ability to use, manage, and
access technology. Students
should know how to use the
technologies how they are
developed, and have skills to
analyze how new technologies
affect us, our nation, and the
world.
Engineering Literacy
• Systematic and creative
application of scientific and
mathematic principles to
practical ends such as design,
manufacture and operation of
efficient and economical
structures, machines, processes
and systems
Mathematics Literacy
• Ability to analyze, reason,
and communicate ideas
effectively as they pose,
formulate, solve and interpret
solutions to math problems in
a variety of situations.
STEM philosophy
• Science
• Technology
• Engineering
• Math
Is integrated
Daily in the
classroom.
What Alcohol is the found
in your glass of wine?
• Isopropyl Alcohol
• Ethyl Alcohol
• Methyl Alcohol
• Propel Alcohol
C2H5OH
• C2H5OH
Correct Answer
C2H5OH
•Ethyl Alcohol
Ethanol has been used by humans
since prehistory as the intoxicating
ingredient of alcoholic beverages.
Dried residues on 9,000-year-old
pottery found in China imply that
alcoholic beverages were used even
among Neolithic people.
What is sodium
bicarbonate?
• Baking Powder
• Alum
• Baking Soda
• Cream of tarter
(Na3HCO3CO3·2H2O),
Correct Answer
• Baking Soda
• In 1791, a French chemist, Nicolas
Leblanc, produced sodium
bicarbonate as we know it today. In
1846 two New York bakers, John
Dwight and Austin Church,
established the first factory to
develop baking soda from sodium
carbonate and carbon dioxide.
What gives tomatoes the
red color?
• Beta Carotene
• Fructose
• Lycopene
• Limonene
Correct Answer
Lycopene
Lycopene's eleven conjugated
double bonds give it its deep red
color and are responsible for its
antioxidant activity. Although
lycopene is chemically a carotene, it
has no vitamin A activity.
What chemical is found
in onions causing you to
cry?
• Acetic Acid
• Hydrochloric Acid
• Nitric Acid
• Sulfuric Acid
Sulfuric Acid
Sulfuric Acid
• When you cut an onion, you break
cells, releasing their contents. Amino
acid sulfoxides form sulfuric acids.
This gas reacts with the water in
your tears to form sulfuric acid. The
sulfuric acid burns, stimulating your
eyes to release more tears to wash
the irritant away.
Fast Food Visuals
• As a class, students select
a meal from a favorite fast
food restaurant. With
science scales and metric
measurement students
create a visual and share
with class.
Burger King Triple
Whooper
1160 calories1158.11
• 76g fat76.32000000000001
• 27g saturated fat
• 3g trans fat
• 205mg cholesterol
• 51g carbs
• 11g sugar
• 68g protein
• 1170mg sodium
BK French Fries large
size
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•
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•
•
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580 calories576.96
28g fat28.4
6g saturated fat6.09
0g trans fat0.25
0mg cholesterol0.19
74g carbs73.91
0g sugar0.19
6g protein6.42
990mg sodium990
BK Large cola drink
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•
•
•
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•
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390 calories388.64
0g fat0
0g saturated fat0
0g trans fat0
0mg cholesterol0
104g carbs104.27
104g sugar104.27
0g protein0
10mg sodium9.48
Experimenting with
Leavening Agents:
• Baking Soda = Sodium Bicarbonate
• Baking Powder = Sodium
Bicarbonate, Sodium Aluminum
Sulfate. Mono-calcium Phosphate
• Yeast= Saccharomyces cerevisiae
Set up Experiment
5 minutes
10 minutes gases cause
balloon to fly off flask
After 60 minutes, gases
still present
24 Hours Later
YEAST (fungi kingdom)
• 200 ML H2O+ 1 TABLESPOON
YEAST
• 200 ML H2O+ 1 TEASPOON
SUGAR+ YEAST
• 200 ML H20+ 1 TEASPOON
SUGAR= ½ TEASPOON SALT
Set up
20 minutes
45 minutes
1 hour
2 hours
3 hours
6 hours
24 Hours
What will the yeast look
like in 48 hours
• Hypothesize at your
table group.
• Write it down on the
note card provided.
• Be ready to share with
the class.
Are you surprised?
Food chemical reaction
Home Made Geyser
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•
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What You Need:
roll of mentos candies
2-liter bottle of diet soda
index card
What do you think happens in your
stomac
Outside
• Remove lid from diet soda.
• Place index card on top.
• Place candy in a roll of paper so the
candy will drop all at once.
• Run fast.
http://www.stevespanglerscien
ce.com/experiment/00000109
Physics!
• Sodas contain compressed carbon
dioxide. It's the gradual expansion
and release of this pressurized gas
in the form of bubbles that gives
carbonated drinks their characteristic
fizz. It's the surface tension of the
liquid -- the strong attraction that
bonds its water molecules together - that prevents the gas from
escaping all at once
• When Mentos are added, that surface
tension is disrupted by additives in the
candy -- gelatin and gum arabic, to name
two likely culprits -- and the outside
surfaces of the Mentos provide
"nucleation sites" that encourage the
rapid formation of bubbles. When you
drop Mentos into a carbonated beverage,
then, you cause the sudden release of
pressurized gas for which the only exit is
up and out through the narrow neck of the
soda bottle -- hence the spectacular
Hypothesize:
•What do you think
the chemical
reaction is in your
stomach?
Hard Cooked VS Hard
Boiled
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Hard Cooked
Place eggs in
sauce pan.
Cover with cool
water
Bring to boil.
Place on lid.
Turn off and let
sit 20 minutes
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Hard Boiled
Place eggs in
sauce pan.
Cover with cool
water.
Bring to boil.
Place on lid and
boil for 20
minutes.
Results: Sulfur Ring
Hard Cooked
Hard Boiled
pH Acids and Bases
• What are the characteristics of
Acids?
• Think of foods that are acidic &
taste:
– Lemons and other citric fruit
– Vinegars
• What are the characteristics of
Bases?
– Baking soda
pH scale
History
• For thousands of years people have
known that vinegar, lemon juice and
many other foods taste sour. However, it
was not until a few hundred years ago
that it was discovered why these things
taste sour - because they are all acids.
The term acid, in fact, comes from the
Latin term acere, which means "sour".
• Bases taste bitter.
[H+]
Acids
Neutral
Bases
pH
1 X 100
1 x 10-1
1 x 10-2
1 x 10-3
1 x 10-4
1 x 10-5
1 x 10-6
1 x 10-7
1 x 10-8
1 x 10-9
1 x 10-10
1 x 10-11
1 x 10-12
1 x 10-13
1 x 10-14
Example
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HCl
Stomach acid
Lemon juice
Vinegar
Soda
Rainwater
Milk
Pure water
Egg whites
Baking soda
Tums® antacid
Ammonia
Mineral lime - Ca(OH)2
Drano®
NaOH
NAMES TO KNOW
• Here are a couple of definitions you
should know:
Acid: A solution that has an excess of H+
ions. It comes from the Latin word acidus
that means "sharp" or "sour".
Base: A solution that has an excess of
OH- ions. Another word for base is alkali.
Aqueous: A solution that is mainly water.
Think about the word aquarium. AQUA
means water.
Rubber Eggs??
• Effect of acid on calcium carbonate?
Hypothesize what will happe.
• Hard cook an egg.
• Place egg in a jar of vinegar. Lids help
keep the room less odiferous.
• Observe what reaction happens when the
egg is placed in the vinegar.
• Leave the egg for 3 days.
• Remove the egg and rinse.
• Results?
Hard cooked egg in
vinegar
Carbohydrates
Fats & Adipose Cells
VITAMINS
PHYTONUTRIENTS