Sharks by:Carson akins

  • Sharks are almost the oldest living things on earth.
  • 100-70 million years ago, the first sharks evolved.
  • All species of sharks are spread out throughout the worlds oceans.
  • There are around 250-300 species of sharks in the world.
  • Fossil records show that the first sharks lived 300 million years ago.
  • Shark fossils are extremely rare because they are mainly made of cartilage.
  • The skin of a female shark is thcker than a males.
  • A shark has 5-6 gill slits.
  • Sharks do not have flaps over their gills.
  • Some even say there are around 465 species of sharks.
  • sharks are near the top of the marine food chain.
  • Sharks belong to a family of fish that have skeletons made of cartilage.
  • Sharks breathe through a series of 5-7 gills.
  • All sharks have multiple rows of teeth.
  • Shark numbers are on the decline due to many threats.
  • Sharks have very sensitive hearing.
  • Sharks can hear a sound from 700ft away.
  • The greenland shark is the slowest fish ever recorded.
  • Sharks have the most powerful jaws on the planet.
  • A shark bites with its upper jaw first.
  • Each sharks tooth is a different shape.
  • A shark may grow 20,000 teeth in a lifetime.
  • Sharks never run out of teeth.
  • All sharks are carnivores.
  • Hammerhead sharks heads have electrical sensors that help them with hunting.
  • The majority of sharks have 8 fins.
  • Sharks eat other sharks.
  • Sharks skin is made of denticles.
  • There are only about 100 shark attacks each year.
  • Humans kill up to 100 million sharks per year.
  • Sharks livers contain oil.
  • Hammerhead sharks travel in schools.
  • Sharks can have up to 3,000 teeth at once.
  • Sharks cartilage is more flexible than bone.
  • Some sharks will eat their siblings eggs.
  • Great whites eat up to eleven tons of food a year.
  • Sharks jaws are not attached to their skull.
  • Sharks teeth are covered in flouride.
  • Female sharks are larger than male sharks.
  • Sharks come in a big variety of shapes.
  • the gestation period for a pregnant shark can be from five months-two years.
  • Some female sharks use sperm from multiple males to reproduce.
  • Bullsharks can also be found in freshwater.
  • Whale sharks are the largest shark species.
  • Not even 100 maegamouth sharks have been seen.
  • The megamouth can grow to be 15ft long.
  • The blue shark can give birth to 135 pups per liter.
  • Some sharks lay eggs and others grow the pups inside of them.
  • A shark is covered in tooth like scales.
  • Lantern sharks can glow in deep waters to distinguish theirselves.
  • Sharks belong to the elasmobranchii family.
  • Most sharks will drown if they stop swimming.
  • Sharks have a lifespan of twenty - thirty years.
  • The fastest a shark can swim is thirty-one mph.
  • Baby sharks are called pups.
  • Sharks are related to stingrays.
  • New research shows sharks may be colorblind

Works Cited

Infoplease. Infoplease. Web. 21 Apr. 2017.

"The 15 Most Surprising Shark Facts." Discovery. 05 June 2015. Web. 21 Apr. 2017.

"Basic Facts About Sharks." Defenders of Wildlife. 19 Sept. 2016. Web. 21 Apr. 2017.

"SHARK FACT INDEX." Worksheets for Kids. Web. 21 Apr. 2017.

"Shark Facts • Interesting Information & Facts About Sharks." Shark Facts. Web. 21 Apr. 2017.

"Shark Guardian - 100 Awesome Shark Facts." SHARK & MARINE CONSERVATION WORLDWIDE. Web. 21 Apr. 2017.

http://school.eb.com/levels/middle/article/shark/277020

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