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Copyright Jeff Levine 2012
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Included Resources
Resource Summary
Necessary Supplies/Materials List
Stomach Model Lab Worksheet
Stomach Model Lab Worksheet Answer Key
Resource Summary
Objective:
Students will be able to model and describe mechanical and chemical
digestion in the stomach.
Notes:
During this lab, students create a simulated stomach and use it to
mechanically and chemically digest food. They then analyze the process.
The Stomach Model Lab can be used to introduce the stomach or
mechanical and chemical digestion, as well as provide students a chance to
continue learning after the concepts have been introduced.
Necessary Supplies/Materials
Stomach Model Lab Worksheet (included)
Stomach Model Lab Worksheet Answer Key (included)
At each lab station:
2 crackers
banana portion
graduated cylinder
water
sealable bag
food coloring
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Copyright Jeff Levine 2012
Name ___________________________________________________ Date ________________
TODAY,
YOU’LL CREATE A STOMACH, FILL IT
WITH FOOD, AND SIMULATE DIGESTION!
2 crackers
water
MATERIALS
banana portion
graduated cylinder
sealable bag
food coloring
Procedures
1. Peel the banana portion (if necessary) and put it in the bag. Throw the peel away.
2. Over the sink/trash, crush up the crackers. Add these to the bag.
3. After letting as much air out as possible, completely seal the bag.
4. With the bag closed, squish and crush the banana and crackers for about 30 seconds.
What does the food look like? ________________________________________________
What does the food feel like through the bag? ___________________________________
5. Measure 25 mL of water in the graduated cylinder. Add two drops of food coloring.
6. Open the bag and add the colored water to the contents of the bag.
7. After letting as much air out as possible, reseal the bag.
8. Again, with the bag closed, squish and crush the banana and crackers for about 30 seconds
What does the food look like? ________________________________________________
What does the food feel like through the bag? ___________________________________
9. Clean up! Throw away the bag (along with the crackers, water, and banana).
1. In the model, what was represented by…
the Ziploc bag? _____________________
opening the bag? ___________________
the colored water? __________________
your hands? _______________________
2. How did the squeezing of the food affect the food’s look and feel? ___________________
_____________________________________________________________________
3. What kind of digestion does squeezing represent? ________________________________
4. How did the addition of the water affect the food’s look and feel? ___________________
______________________________________________________________________
5. What kind of digestion does the addition of water represent? _______________________
Copyright Jeff Levine 2012
http://www.teacherspayteachers.com/Store/Science-Teacher-Resources
Name ___________________________________________________ Date ________________
TODAY,
YOU’LL CREATE A STOMACH, FILL IT
WITH FOOD, AND SIMULATE DIGESTION!
MATERIALS
2 crackers banana portion
graduated cylinder
water
sealable bag
food coloring
Procedures
1. Peel the banana portion (if necessary) and put it in the bag. Throw the peel away.
2. Over the sink/trash, crush up the crackers. Add these to the bag.
3. After letting as much air out as possible, completely seal the bag.
4. With the bag closed, squish and crush the banana and crackers for about 30 seconds.
What does the food look like? ________________________________________________
What does the food feel like through the bag? ___________________________________
5. Measure 25 ml of water in the graduated cylinder. Add two drops of food coloring.
6. Open the bag and add the colored water to the contents of the bag.
7. After letting as much air out as possible, reseal the bag.
8. Again, with the bag closed, squish and crush the banana and crackers for about 30 seconds
What does the food look like? ________________________________________________
What does the food feel like through the bag? ___________________________________
9. Clean up! Throw away the bag (along with the crackers, water, and banana).
1. In the model, what was represented by…
the Ziploc bag? stomach walls
opening the bag? swallowing
the colored water? stomach acid
your hands? the muscles of the stomach
2. How did the squeezing of the food affect the food’s look and feel? It broke the food down
into smaller pieces – it looked mixed together and it felt more gooey.
3. What kind of digestion does squeezing represent? mechanical digestion
4. How did the addition of the water affect the food’s look and feel? It made it much more
liquidy and gooey – it looked really mixed and felt like a thick liquid.
5. What kind of digestion does the addition of water represent? chemical digestion
Copyright Jeff Levine 2012
http://www.teacherspayteachers.com/Store/Science-Teacher-Resources