Where a Bull Shark Goes: teacher key

Bull Sharks, grade 8 edition, written for 8th grade. Bull sharks have been found in oceans around the world and far up rivers. Read how far they roam and how they keep their balance in salt and fresh water.

Read the book. Print this page for the key.

Questions and answers

1. Where have bull sharks been found in the western Atlantic?
   • From Massachusetts to southern Brazil (answer)
   • Only in the Arctic
   • Only in lakes
2. What did the study find about bull sharks caught in fresh water?
   • Larger teeth
   • Lower salt levels in their blood (answer)
   • Brighter colours
3. How far have bull sharks been recorded covering in 24 hours?
   • Up to 5,000 kilometres
   • Up to 2 kilometres
   • Up to 180 kilometres (answer)
4. What kind of sounds can a bull shark hear?
   • From 100 to 1,500 hertz (answer)
   • Only above 20,000 hertz
   • None
5. Why does a bull shark's kidney work hard in fresh water?
   • To make more urea
   • To keep salt in its body (answer)
   • To find food

Words

• hertz: sound cycles
• estuaries: river mouths
• lagoons: shallow salt ponds