SEATS! 5th HOUR

SEATS! 6th HOUR

SEATS! 7th HOUR

**Quiz on Monday, Reminder: Brine Shrimp Lab due TOMORROW

Bell Work: Thurs. 9/151. At least one complete sentence:

What is one thing you learned from the starch test in the last class?

2. What was the name of the liquid we used in the last class to determine if a food was high in starch? (Hint: it started with an “i”)

3. What are some types of sugar you know of (Hint, all sugars end in “-ose”)

4. Draw a picture of a sugar molecule(or close approximation at least)

5. What one ingredient do all of the foods shown below have in common?

Objectives!

Students will be able to:• Hypothesize about the amount of sugar in

common foods• Investigate the sugar concentrations of

foods using benedict’s solution with hot water baths

• Conduct the lab in a safe manner• Draw conclusions about similarities

between foods with high amounts of sugar

• Sugars–Are small molecules

–Functions:• Provide quick energy

• Are building blocks for

carbohydrates

Examples of sugar1. Fructose:

fruit sugar

• Lactose: milk sugar

• Glucose: blood sugar

• Sucrose table sugar

Sugar Lab

 Predicted Sugar

Actual Sugar

Carrot    

Potato    

Beans    

Rice    

Apple    

Cucumber    

Cheerio    

Onion    

Banana    

Corn    

Spaghetti    

Predict the Amount of Sugar

0 = no sugar+ = a little sugar++ = medium sugar+++ = lots of sugar

Sugar Lab Steps1. Add food item to each test tube2. Shake it down to the bottom3. Add SMALL AMOUNT benedict’s solution4. Put in Hot water bath for 2-3 minutes5. Record you results 6. Clean your test tubes with brushes7. Contents go in the blue bin, NOT THE SINK8. Return petri dish to your lab station, and test

tubes upside down cleaned

Safety

• Goggles!

• Test tubes are hot, use the test tube tongs

• Don’t sit on the counters

Sugar Lab Questions1. Which foods did you notice have the most sugar?2. Which foods had more sugar than you thought?3. Which foods had less sugar than you thought?4. Were there any foods that had a lot of sugar but do not

taste sweet?5. What are some other foods not in this experiment that

you think would be high in sugar?6. Answer in 2-3 sentences:

What do foods with sugar have in common? (do they taste the same? Have the same color before adding the Benedict’s solution? Same texture?)