American Shark by keralaguest




                            American Shark

1. How many people died in 1916 in America?
     a. 5

2. When did Americans really become afraid of sharks?
     a. The release of the movie Jaws

3. Near Cape Cod and New York Harbor, what types of sharks are common?
      a. Deep in the water
              i. Smooth hound
             ii. Hammerhead
            iii. Cat shark

4. What amount of sharks exists in water deeper than 200 meters?
     a. 1/3

5. What are the general features of a deep-water shark?
     a. Small (1 meter)
     b. Most are black
     c. Large green eyes

6. What shark surprised the submersible off of New York Harbor?
     a. 3 to 4 feet across
     b. 14 to 16 feet long
     c. Greenland shark
     d. Found from Greenland down the east coast to New York

7. Describe a Greenland shark.
      a. Grows to 22 feet
      b. No record of attacks on humans
      c. Nearly blind—wormlike parasites grow on its eye
      d. Great sense of smell
      e. Eat reindeer even if it was found in the water
      f. Will eat other Greenland sharks
8. North Carolina hotspot has what type of shark? Why are there so many?
      a. Sand tigers
      b. Two large shipwrecks are at the bottom there. Corals and barnacles
          live there in a reef attracting several fish and sharks.

9. What covers a sand tiger shark?
     a. Baitfish

10. What does the baitfish get from the sand tiger?
      a. Protection

11. Describe a sand tiger shark.
       a. Swim at 25 miles per hour
       b. Eat fish, crab, lobster and squid
       c. Eat almost anything, even tin cans
       d. Do not eat people
       e. Can be 15 feet long

12. What happened to the sand shark population after a diver accidentally killed one?
      a. Every shark left the area the next day, and they did not return to the
          specific area for two years.

13. Why are there many sharks on the Florida coast, like Daytona?
      a. River inlets provide food and shelter to young sharks.

14. What happened in 2001 in Daytona?
      a. Most shark bites worldwide
      b. Half of the world’s shark bites came from Daytona that year.
      c. No one died

15. Where do baby sharks grow before they go out the open sea?
      a. Inland waters (inlets)

16. Why do hammerhead sharks come to the reefs in the daytime?
      a. To be cleaned by smaller fish—pick off parasites

17. How many types of hammerhead sharks are there in the U.S.?
      a. Three

18. Why do hammerheads have a wide head?
      a. It places their electrical sense organs wider apart to detect prey more

19. Can a great hammerhead be aggressive?
       a. Yes
20. What is unusual about the scalloped hammerhead?
      a. Females are social during the day

21. Are lemon sharks loners?
       a. No. They can be found in large groups, but probably for breeding.

22. What evidence about sharks is found in Venice Beach, Florida?
      a. Sharks teeth capital of the world
      b. Can find 200 on a good day of looking

23. Describe a shark’s teeth.
       a. Grow in rows and are replaced right away.

24. Why does Venice Beach have so many sharks’ teeth?
      a. Most come from prehistoric sharks that existed when the area was
          covered by water.
      b. 10 million years ago
      c. The teeth show that many of the same species that existed 10 million
          years ago still exist today.
               i. Nurse shark
              ii. Bonnethead
             iii. Tiger shark

   25. What very large shark existed off of Venice Beach in prehistoric time?
   a. Megalodon

26. Describe the Megalodon.
       a. 40 feet long
       b. Ate whales
       c. Went extinct 2 million years ago
       d. Largest predator to ever live on the planet

27. What is the price of a 7 inch Megalodon tooth?
      a. $25,000

28. What happened in September 2001?
      a. Had a tropical storm that hit the west coast.
      b. The sharks predicted the storm and they all left the bay before the
          storm hit.
      c. After the storm passed, they returned
      d. Hypothesis: the lower pressure made the sharks feel like they were in
          5 feet of water instead of 7 feet. This made them think they needed to
          be in deeper water.
29. How are Bull sharks important to us?
      a. Important garbage collectors in the ecosystem.

30. What general types of sharks mix in the Gulf of Mexico?
      a. Both warm and cold water sharks

31. How many oil rigs are in the Gulf?
      a. 4,000

32. How does marine life use the oil rigs?
      a. As coral reefs

33. What big shark comes to the Gulf of Mexico?
      a. Whale shark, largest of all sharks and fish

34. Why are cold water sharks popular in the Pacific Ocean on the west coast?
      a. Water is 5 degrees F cooler

35. Describe a blue shark.
       a. Lives on the west coast in cooler water
       b. Has strange, staring eyes
       c. Long fins
       d. Smell hunter
       e. Swim at 40 miles per hour
       f. Like to eat single fish
       g. Will eat krill that are balled up in high concentrations by sardines
           and anchovies.

36. Describe the mako shark.
       a. Lives on the west coast in cooler water
       b. Short fins
       c. Open mouth
       d. Visual hunter
       e. Swim at 40 miles per hour
       f. More aggressive because it is a visual hunter
       g. Can travel 100 miles a day to look for food

40. Describe the megamouth shark.
      a. Massive head
      b. Body up to 17 feet long
      c. Filter feeder like the basking shark
      d. Not aggressive
      e. Only six more megamouths seen off the coast of California in the last
41. What is the real home territory of the Great White Shark?
      a. San Francisco shore

42. Describe the Great White shark.
      a. Most feared
      b. Grow up to 3 tons and 23 feet
      c. Can swim 40 miles per hour
      d. Eat seals
      e. Can attack humans

43. Through the captivity of a female, what have scientists learned?
      a. Young are different from adults
      b. Young have less muscular jaws
      c. Young have more pointed teeth
      d. Young feed on fish and not seal

44. What sharks live in Alaska?
      a. Sleeper sharks
      b. Spiny dogfish
      c. Salmon sharks

45. What has changed in the last 10 years in Alaska?
      a. More and more sharks

46. Describe a sleeper shark.
      a. Rarely been filmed alive
      b. Wide bodies, up to 22 feet
      c. May be the same species as the Greenland shark

47. Describe the special feature of the salmon shark.
      a. Its body temperature is about 15 degrees C above water temperature.
          Give shark advantage because it can swim and think faster than other
          fish in colder water.

48. Why can a Bull Shark live in fresh water?
      a. Its kidneys are super efficient

49. What was caught in St. Louis?
      a. 9 foot shark
      b. 1750 miles inland
      c. 30 feet of water

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