Great and Scalloped: teacher key

Hammerhead Sharks, grade 6 edition, written for 6th grade. Two kinds of hammerhead shark, the great and the scalloped, differ in size, head shape and where they swim. Both live in warm seas.

Read the book. Print this page for the key.

Questions and answers

1. Which hammerhead is the biggest kind?
   • The scalloped hammerhead
   • The great hammerhead (answer)
   • They are the same size
2. What is in the middle of the front of a scalloped hammerhead's head?
   • A notch (answer)
   • A straight edge
   • A fin
3. As of November 2026, how long are the longest scalloped hammerheads reported?
   • 610 centimeters
   • 430 centimeters (answer)
   • 152 centimeters
4. Which kind of hammerhead is reported to grow longer and heavier?
   • The scalloped hammerhead
   • Neither kind
   • The great hammerhead (answer)
5. What does the word migrate mean here?
   • To travel with the seasons (answer)
   • To stay in one place
   • To eat squid
6. How long does a mother scalloped hammerhead carry her pups?
   • 9 to 10 months (answer)
   • 2 weeks
   • 5 years

Words

• cephalofoil: wide hammer head
• ampullae: electric sense organs
• migrate: travel with seasons
• cephalopods: squid and kin
• invertebrates: animals without backbones