Evidence in the Pipes: teacher key

Poop and Pee, grade 9 edition, written for 9th grade. From a cholera outbreak to cube-shaped wombat poop, scientists have learned how the body makes waste by testing ideas, counting cases and building models.

Read the book. Print this page for the key.

Questions and answers

1. Which sentence best describes what pee is?
   • Waste and extra water that the body does not need (answer)
   • Bile that the liver makes
   • Leftover food the body cannot use
2. What happens in reabsorption?
   • Wastes are added to pee
   • Useful things go back into the blood (answer)
   • Bile is stored
3. Why did scientists build mimic intestines?
   • To store bile
   • To measure kidney size
   • To test how stiff and soft parts could make cubes (answer)
4. What helps give poop its brown color?
   • Bilirubin sent out in bile (answer)
   • Pepsin from the stomach
   • Villi in the small intestine
5. What does it mean to emulsify fats?
   • Burn them
   • Store them
   • Break them into tiny droplets (answer)

Words

• cholera: water-borne illness
• emulsify: break into droplets
• microbiome: gut bacteria community
• glomerulus: kidney filter
• reabsorption: taking back in