Outline Are FishA) Sharks are fish made

Outline “What Do You Know About Sharks?” I) Sharks Are VanishingA) Sharks need protectionB) Without sharks, the ocean would overpopulate and the ecosystems would be destroyed.II) Sharks Are FishA) Sharks are fish made of rubbery cartilage instead of bone. B) They’re cold-blooded.C) They breathe through gills.D) They have a two-chambered heartIII) What Are the Largest and Smallest Sharks?A) Weighing 15 tons and stretching up to 46 feet long, the whale shark is the worlds largest fish.B) 2,953 feet below the ocean surface lives the smallest shark: the dwarf shark.C) An adult dwarf shark only grows up to about 10 inches long.IV) Not All Sharks Mean To Bite HumansA) Scientists have one theory about sharks biting humans: sharks may mistake the sound of humans playing around in the water for an injured fish, which is easy prey for sharks.V) Which Is the Most Dangerous Shark?A) People fear the great white the most because of its razor-sharp teeth and its massive size: 21 feet long.B) People are also afraid of great whites the most because of the “Jaws” movies.C) Worldwide, fewer than 100 human attacks by all shark species are reported each year.VI) Where Do Most Attacks Happen?A) Florida has the most shark bites in the world reported each year: 22 to 25.VII) How Powerful Is A Shark Bite?A) Scientists built a meter that measures the bite of the dusky shark.B) The bite of a dusky shark exerts 18 tons of pressure per square inch on its victims.VII) What Food Do Sharks Snack On?A) Sharks eat what they can when they can- usually smaller animals like shrimp and fish but sometimes like to go bigger and eat animals like turtles and seabirds.B) Some species of sharks, for example, the bull shark, consume larger animals like sea lions or dolphins.C) Another species of sharks-the whale shark- feast on only plankton, which are tiny drifting animals.D) Tiger sharks eat almost everything- mammal carcasses, cans, plastic bags and many other random items.IX) How Do Sharks Find Their Meals?A) Sharks can hear a large range of sounds but are normally only attracted to large bursts of sound- like those made by hurt fish- or occasionally humans bouncing and jumping around in the water.B) When very close to something, sharks can feel vibrations with their lateral line, a sensory system that runs from the head to tail on each side of the shark’s body.C) Inside the shark’s lateral line, which helps a shark maintain balance as well as detect sound, are canals filled with a fluid and what some would call “hair cells”.D) The way that the sharks can feel this is the sound causes the liquid to vibrate, alerting the shark that another creature is very near.E) This sense even allows sharks to be able to hunt in total darkness.X) What’s the So-Called “Feeding-Frenzy”?A) Sharks normally travel alone, however, if one finds easy prey, an excited, competitive swarm of sharks may join in the feast, biting anything they come across.XI) How Does A Shark Breathe Underwater?A) Sharks usually swim with their mouth open to force water filled with lots of oxygen to pass over a set of gills housed in a cavity behind its head- a process known as ram-jet ventilation.B) Gill flaps called lamellae absorb and help spread the oxygen around into the shark’s bloodstream. C) Lamellae also help to expel carbon dioxide out of the bloodstream.XII) What Are Shark’s Greatest Nemeses?A) A shark’s greatest enemies are humans.B) We kill sharks for food.C) We use their skins for leather.D) We make medicine from their liver oil.E) We also use shark teeth for jewelry.F) Many sharks are killed senselessly for sport or get trapped and die in fishing nets.G) It also takes a long time for sharks to reach reproductive age, and even when they do they only produce about a dozen or fewer pups.


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