integrating stem in middle level food science

Integrating STEM in Middle Level Food Science

Peggy Templeton M.Ed. NBCTKathryn Wilkie NBCTCentral Kitsap School District

Contact Information• Peggy Templeton • peggyt@cksd.wednet.edu• http://moodle.cksd.wednet.edu/

View Secondary Schools, to CKJH and click on Templeton

• Kathryn Wilke• kathrynw@cksd.wednet.eduCentral Kitsap SchoolsPO Box 8Silverdale, 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• MathIs integratedDaily 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

•Ethyl AlcoholC2H5OHEthanol 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 Whooper1160 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• 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• 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

• 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.stevespanglerscience.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 fountain effect

Hypothesize:

•What do you think the chemical reaction is in your stomach?

Hard Cooked VS Hard Boiled

Hard Cooked• Place eggs in

sauce pan.• Cover with cool

water• Bring to boil.• Place on lid.• Turn off and let

sit 20 minutes

Hard Boiled• Place eggs in

sauce pan.• Cover with cool

water.• Bring to boil. • Place on lid and

boil for 20 minutes.

Results: Sulfur RingHard 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

• What is the reaction when you mix them?

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+] pH Example  

Acids

1 X 100 0 HCl 1 x 10-1 1 Stomach acid1 x 10-2 2 Lemon juice1 x 10-3 3 Vinegar1 x 10-4 4 Soda1 x 10-5 5 Rainwater1 x 10-6 6 Milk

Neutral 1 x 10-7 7 Pure water

Bases

1 x 10-8 8 Egg whites1 x 10-9 9 Baking soda1 x 10-10 10 Tums® antacid1 x 10-11 11 Ammonia1 x 10-12 12 Mineral lime - Ca(OH)2

1 x 10-13 13 Drano®

1 x 10-14 14 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