Description: Demonstrations model how acids, enzymes, and emulsifiers act on common foods.
Objective
Simulate key digestion steps: acid action, emulsification, and enzyme breakdown.
Materials
- Safe acids/bases (vinegar, baking soda), oil + water
- Dish soap (emulsifier), gelatin cubes or bread
- Iodine solution (starch indicator), beakers
Procedure
1. Emulsify oil with water using soap; observe droplet size.
2. Test starch presence before/after exposure to simulated “enzymes” (demo).
3. Show acid effect on gelatin/bread structure.
4. Record observations and relate to stomach/intestine roles.
Conclusion
Digestion relies on chemical conditions and catalysts that change food structure.
