Visit Your Local PBS Station PBS Home PBS Home Programs A-Z TV Schedules Watch Video Donate Shop PBS Search PBS
SAF Archives  search ask the scientists in the classroom cool science
Guide Index

Shark Trackers

Hidden Depths

Shell Game

Spineless, But Smart

Whale Warning

Viewer Challenge
in the classroom

Creatures of the Deep: Viewer Challenge

Watch Scientific American Frontiers Show 604, "Creatures of the Deep," and test your knowledge by answering these questions. (Answers are below.)

Shark Trackers
    1. How does a shark respond when rolled onto its back?

    2. In what ways does a hammerhead shark "use its head"?
Hidden Depths
    3. How deep does the Ventana ROV dive?

    4. What characterizes the middle depths of the ocean?
Shell Game
    5. How does the starfish on the show digest its food?

    6. What kinds of shells does biologist Gary Vermeij find most intriguing?
Spineless, But Smart
    7. Where is the mouth of an octopus located?

    8. What's inside the jar that the octopus opens?
Whale Warning
    9. Why are audible alarms needed on the fishing nets?

    10. Why is it important to find the correct frequency for the alarms?
  1. Goes to sleep.
  2. Binocular vision, nostrils, electromagnetic sensors, efficient swimming.
  3. 2500'.
  4. Very low levels of light and oxygen.
  5. Its stomach extrudes and pokes into the snail shell, digesting the mollusk externally.
  6. Survivors of attacks, especially those that lived to repair wounds.
  7. Underneath the abdomen.
  8. A crab.
  9. To warn whales.
  10. So whales hear but fish do not.


Scientific American Frontiers
Fall 1990 to Spring 2000
Sponsored by GTE Corporation,
now a part of Verizon Communications Inc.