Digestive System
Science Fair Projects
Ideas and Sample Projects by Grade Level


Home Experiments Medical Jokes Warning!
Primary School - Grades K-3
P=Project   E=Experiment
Investigate how the anti-gas drug simethicone can get rid of trapped gas. [E]
Elementary School - Grades 4-6
P=Project   E=Experiment
Research the Coeliac Disease [E]
How does constipation affect the body? [E]
Dissolution Rate of Lactase Pills [P]
Which Antacid Can Neutralize The Most Stomach Acid? [P]
Middle School - Grades 7-9
P=Project   E=Experiment
Find out whether drinking cold water with a meal is harmful to your health. [E]
Which Pain Reliever Dissolves in Simulated Gastric Fluid the Fastest? [P]
Explore the basis of lactose intolerance [E]
How to Prevent Salmonella [P]
Which Antacid Will Neutralize Gastric Acid the Best? [E]
Research what is more effective in reducing acidity in the stomach: avoiding acidic food, or taking an antacid? [E]
Investigate if starch would combine with glucose and exit the semi-permeable membrane of a sausage casing representing an intestine. [E]
The Effect of Ingested Fluid Temperature on Basal Body Temperature in Humans [E]
Which is a Better way to Diet? [P]
How Many Calories do I take in Everyday? [P]
Determine if different types of gum have an effect on the temperature of a person's mouth. [E]
Yeast: Good, Bad, or Worse? [E]
High School - Grades 10-12
P=Project   E=Experiment
What Is the Optimal Ratio of Glucose to Fructose that Prevents Fructose Malabsorption? [E] [E]
Determine which ibuprofen product dissolved quickest and by what process in the stomach. [E]
Observe whether or not multiple biotypes of Commensal E. coli thrive within the intestine simultaneously and occupy the human intestine over time. [E]
Does the Concentration of Pepsin Affect How Thoroughly Proteins Are Digested? [E]
The Effect of Concentration of Fluoride in Saliva on the Remineralization of Hydroxyapatite [E]
Useful Links
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Science Fair Projects Resources [R]
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Safety Resources [R] [R]
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