What Is Still Being Measured: teacher key

Bull Sharks, grade 12 edition, written for 12th grade and up. Studies from 2024 and earlier help explain nursery waters, food and bite numbers, and as of November 2026 the Red List rates bull sharks as Vulnerable.

Read the book. Print this page for the key.

Questions and answers

1. Where did young bull sharks use as nursery habitats in the 2024 study?
   • Deep open ocean
   • The upper reaches of bays and estuaries (answer)
   • Dry land
2. What makes up the vast majority of a bull shark's diet?
   • Seaweed
   • Plankton
   • Bony fishes and small sharks (answer)
3. How does the Red List rate the bull shark, as of November 2026?
   • Vulnerable (answer)
   • Extinct
   • Very common
4. Why do the bite force numbers need care?
   • They are about a whale
   • They are calculated (answer)
   • They are too small
5. What does nursery mean in this book?
   • A kind of food
   • A fast swim
   • A place where young grow up (answer)

Words

• nursery: pup-raising place
• newtons: force units
• allometry: growth with size