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It explains how many shark species exist, why only a few are responsible for most attacks, and how people can impact sharks. The book covers prehistoric sharks, modern sharks’ size range and habitats, and key traits such as gills, cartilage skeletons, and continuously replaced teeth, along with different shapes and how sharks move.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":10,"@type":76,"position":81},"https://docshare.wps.com/document/story-novel/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/sharks-419354/419354/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/sharks-419354/419354.png","ImageObject",300,407,{"name":92,"@type":93},"Jacob","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-09-28",true,{"@type":102,"interactionType":103,"userInteractionCount":34},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"How many kinds of sharks exist, and how many cause most attacks?","Question",{"text":112,"@type":113},"About four hundred different kinds of sharks exist. 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 \nWhen most people think about sharks,theythink about danger.Not all sharks are ferociouskillers.About four hundred different kinds ofsharks exist.But only four kinds of sharks areresponsible for most shark attacks.People cancause sharks more harm than sharks cause them.Let's learn the facts about sharks.The truth maysurprise you.  \nThis gray reef shark's teethmake it look dangerous.  \nScientists use fossils to createmodels of ancient sharks.  \n# Prehistoric Sharks\n\nSharks existed millions of years ago.Sharkswere alive when dinosaurs roamed the earth.TheTyrannosaurus rex ruled the land.Sharks ruledthe sea.Prehistoric sharks were very big.Theyweighed as much as three male elephants!Dinosaursdisappeared a long time ago,but sharks are stillalive today.  \nThe food chain shows how energy moves from thesun to plants and animals in an ecosystem.Thischart shows the food chain in a marine ecosystem.  \nSharks Today  \nToday,sharks still live in oceans all over theworld.The largest shark is the whale shark.Somewhale sharks are more than 40 feet long.The whaleshark is the biggest fish in the sea.It is bigger thana school bus.The smallest shark is the spinedpygmy shark.It is only six inches long.It can fit inyour pencil box.  \nSharks are predators.They are at the top of themarine food chain.Some large sharks eat smallersharks.Smaller sharks eat smaller fish.Those fisheat even smaller fish and plant life.  \n# Common Traits\n\nAll sharks are alike in some ways.All sharksare fish.They have backbones.They live in theopen slits on the sides of a fish.When water passes over thegills,they absorbOxygen.  \nSharks breatheusing gills.  \nSharp new teeth take theplace of broken teeth.  \nUnlike most fish,a shark’s skeleton is not madeof bone.It is made of cartilage.Cartilage is light,strong,and easy to bend.The end of your nose ismade of cartilage.  \nSharks do not have scales like other fish.Theyhave a hard outer layer called “skin teeth.”It isrough like sandpaper.  \nSharks have sets of teeth arranged in rows.Sharks often lose their teeth.But they are alwaysgrowing new teeth to replace the ones they lose.Amature shark may have lost more than 20,000 teeth!  \n# Different Shapes and Sizes\n\nSharks do not all look alike.Shark shapes vary.Some are flat like a pancake.Flat sharks live at thebottom of the sea.Some sharks have a rou","cbCaibMjASLhdiUD","https://ap.wps.com/l/cbCaibMjASLhdiUD","pdf",1832476,"English","# Prehistoric Sharks\n# Sharks Today\n# Common Traits\n# Different Shapes and Sizes","[{\"question\":\"How many kinds of sharks exist, and how many cause most attacks?\",\"answer\":\"About four hundred different kinds of sharks exist. Only four kinds of sharks are responsible for most shark attacks.\"},{\"question\":\"What do scientists use to study ancient sharks?\",\"answer\":\"Scientists use fossils to create models of ancient sharks.\"},{\"question\":\"What traits are common to all sharks?\",\"answer\":\"Sharks are fish with backbones, breathe using gills, have cartilage skeletons, and replace broken teeth with new ones. They also have a hard outer layer called “skin teeth” instead of scales.\"}]","Sharks | PDF",1790616687,31]