The Gas Makers Inside You: teacher key

Burps and Farts, grade 4 edition, written for 4th grade. Tiny bacteria and swallowed air make the gas that comes out as burps and farts. See how it works and why it is normal.

Read the book. Print this page for the key.

Questions and answers

1. Where is most fart gas made?
   • In the mouth
   • By bacteria in the large intestine (answer)
   • In the lungs
2. Which foods have fiber that makes more gas?
   • Beans and cabbage (answer)
   • Water and ice
   • Salt and pepper
3. What happens to most swallowed air?
   • It comes back up as burps (answer)
   • It turns into fart gas
   • It gets stuck for days
4. When do burps come most often?
   • Soon after eating (answer)
   • In the middle of the night
   • Only after sports
5. Why does eating more fiber tend to make more gas?
   • Bacteria get more undigested food to work on (answer)
   • Fiber is full of bubbles
   • Fiber makes you swallow air
6. What does digest mean here?
   • Break down food (answer)
   • Throw away
   • Swallow air

Words

• bacteria: tiny living things
• fiber: plant food bulk
• carbohydrates: sugars and starches
• digest: break down food