sharks. sharks sharks have been on earth for more than 450 million years. older than dinosaurs....
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SHARKS
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Sharks
• Sharks have been on earth for more than 450 million years. Older than dinosaurs.
• Sharks belong to the class of fish: Chondrichtyes.
• More than 400 shark species
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Habitat
• Generally live in waters from 7,000 feet to 10,000 feet.
• Only come to the surface when searching for food.
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Physical Characteristics
• Cartilage skeleton: flexible and lighter tissue for better movement.
• Skin: made up of dentricles which are hard, sharp teeth that help protect from injuries
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The Mouth• Can move their upper and lower jaws
• Each type of shark has different shaped teeth depending on what it eats.
• Sharks have many rows of teeth. As teeth wear down or fallout those from the back move into forward slots.
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Diet• Most sharks are carnivores. • Live on a diet of fish and sea mammals
(dolphins and seals). • Some sharks will eat other sharks. • Sharks have super senses that help them find
predators. – 2/3 of their brain is dedicated to smell– Can feel vibrations to alert of potential prey
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Video: Chances of Getting eaten by a shark
http://science.howstuffworks.com/environmental/life/zoology/marine-life/
shark-diet.htm
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Sharks in Nova Scotia
Great White Shark found in Economy, Nova Scotia in the
Bay of Fundy (2011).Near Chester, Nova Scotia
2010
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Myth Busters
Video: Punching a sharkPart 1:http://www.youtube.com/watch?v=QTYN5yMAoYM Part 2: http://www.youtube.com/watch?v=uZBjFhj985A
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Great White Appetite
http://www.youtube.com/watch?v=IDFQeRhCqbw