Facts and Fun about Science and Social Studies topics compiled by Drew Dell.

Shark Facts
  Sharks have been around for about 400 million years.  
  Sharks have the most powerful jaws on the planet.  Unlike most animals' jaws, both the sharks' upper and lower jaws move.  
  Sharks never run out of teeth.  If one is lost, another spins forward from the rows and rows of backup teeth.  
  Sharks can have from 1 to 100 babies at a time, depending on the type of shark.  
  On average, there are only about 100 shark attacks each year and 10 of those result in a human death.   
  A shark is a fish. It breathes through its gills, has a backbone and lives in water.  
  Sharks can detect one part of blood per ten billion parts of water – that means they could detect one drop of blood in an area the size of an Olympic swimming pool!  
  The mako is the fastest shark in the ocean, able to swim at up to 22mph.  
  The dwarf lantern shark {Etmopterus perryi} is the smallest shark and grows to only about 15cm.  
  About 75 shark species are in danger of becoming extinct.  
  Most sharks have at least four rows of teeth. As the first row of teeth in a shark gets worn out, the other rows of teeth move forward.  
  Sharks are covered in sharp, toothlike scales called denticles.  
 


Shark Fun              ?Shark Trivia
 

  

Facts were collected from the following pages:
 http://www.kidzone.ws/sharks/facts.htm
http://www.sharkfoundation.com/facts.htm
http://www.factmonster.com/spot/sharks2.html