Ice Cream / Slushies: · Gallon and quart-sized FREEZER bags · Ice · ½ cup table salt for every two students · Ice cream or beverage in the quart-sized bag – seal with as much air out of the bag as possible · Ice and salt in gallon-sized freezer bag – quart-sized bag in size – squeeze with ice in exterior bag · Ice cream mixture – Gallon of whole milk (pour out enough to put 1.5 to 2 cups of sugar) add vanilla or chocolate to taste
Students will describe the processes and parts of the digestive system using appropriate vocabulary.
Materials:
Left over foods to constitute “3 meals” Blender Bag labeled small intestines Beakers – one with green water – amylase (enzyme in saliva – breaks down carbs), red water – hydrochloric acid, and yellow water (bile) Nylon hose Basin Scissors
Procedure:
Label parts with one color and processes with another Where does digestion begin? Mouth – mastication Salivary glands – enzyme – amylase Place breakfast in blender with amylase – masticate Move food to esophagus – peristalsis Stomach – add hydrochloric acid and bile – churn After 4 hours – move to small intestine (baggie) Lunch – repeat process Discuss small intestine – approximately 21 feet in adults (15 feet in 10 year-olds) – composed of villi – remove nutrients Dinner – repeat process Large intestines – discuss – 3 feet, removes water – diarrhea occurs when not functioning properly Pour into nylon hose over basin – have student simulate peristalsis, another student cut an anus in the nylon Total process takes 18-24 hours on average
A Drop Of Water by Walter Wick (Hardcover - Apr. 1, 1997) http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Dstripbooks&field-keywords=A+drop+of+water&x=0&y=0
Spangler, S. (2010). Naked eggs and flying potatoes: Unforgettable experiments that make science fun. Austin, TX: Greenleaf Book Group Press.
Spangler, S. (2012). Fire bubbles and exploding toothpaste: More unforgettable experiments that make science fun. Austin, TX” Greenleaf Book Group Press.
Gray, T. (2009). Theo Gray’s mad science: Experiments you can do at home – but probably shouldn’t. New York, NY: Black Dog & Leventhal Publishers.