Science Starter
• When do you take tums or Pepto-Bismol?
• What do you think is inside these two medicines?
• What do you think these two medicines do to help your
stomach?
**Turn in your Ch.1 Pretest HW even if you are not done!**
Today’s Agenda
• Science Starter
• Organic Compounds Lab
• Lab Discussion
• Quiz Return
• Exit Quiz/Homework
Egbert's Stomach
• Today we will be finishing our discussions of organic
molecules and chemistry
• The goal of this lab will be to identify the contents of
Egbert’s stomach using various solutions
• Important to consider positive vs. negative results
• Consider why these reactions are taking place
Materials
At your Station:
• Egbert’s stomach contents
• 4 test tubes
• Test tube rack
• Gloves
• Goggles
• Brown Paper
• Beakers
• Glass Dropper
At Front:
• Biuret Solution
• Benedict’s Solution
• Iodine
• Paper Towels
Want to check your work??
OR you can google “occc biology labs organic compounds” and click on first link
CARBOHYDRATES
• TEST FOR SUGARS = BENEDICT’S
REAGENT
• POSITIVE TEST RESULT: BROWN
SOLUTION
CARBOHYDRATES
• TEST FOR STARCHES
(CARBOHYDRATES) =
IODINE
• POSITIVE TEST RESULT:
PURPLE/BLACK
SOLUTION
LIPIDS
• TEST FOR LIPIDS = SUDAN IV OR
BROWN PAPER BAG
• POSITIVE TEST RESULT: RED
SOLUTION
PROTEINS
• TEST FOR PROTEINS = BIURET’S
REAGENT
• POSITIVE TEST RESULT: PURPLE
SOLUTION
Egbert Lab Discussion
• How do we know if a certain organic molecule was present?
• What are the contents of Egbert’s stomach?
• What is the point of this lab?
Organic Molecules Quiz
• Quiz score should be at top right
• Look at the questions you missed with your notes, make sure you
understand these basic concepts!!
• If you are struggling with this content, please stay after school this
week (tomorrow or Thursday)
• Remember that quiz grades are now informal, so do your homework!!
Exit Quiz & Homework
• For homework complete your lab report and turn in
tomorrow (white sheet and separate sheet with
answers)
• For exit quiz take out a piece of paper, pencil, and put
everything else away!!
Exit Quiz
• What organic molecule are starches/sugars?
• What is the role of protein in the body?
• What is the role of fat in the body?