Class+1-+Animals+&+Magnatism+1

= = =// Class 1 - Animals & Magnetism 1 //= = By: Katie, Erin , and Jahan =

= History = At the University of North Carolina a scientist figured out that loggerhead turtles know where they are in the ocean. But how do they do it? They use the Earths magnetic field to know where they are. It's like a map inside their head. Scientists have recently discovered that cattle,deer,birds,bats,turtles, fish and lobsters are also affected by magnetism.

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Animals and Magnetism Video (YouTube.com)

= Uses = Birds use magnetism to fly south for the winter. The birds head and beak act like a compass because they can see Earths magnetic field. Baby sea turtles use it to find their way to the ocean,and they also use it to find food. But sometimes we use animals to find out more about magnetism in ourselves. Scientists are studying them today learning about them and how they use magnetism.



= Advantages and Disadvantages =

advantages:

 * Magnetism helps birds and butterflies migrate.
 * Turtles use magnetism to find food and to find their way through the ocean.
 * If it weren't for magnetism inside birds they would not know to fly south for the winter, or even which way south is.
 * Birds also have magnetism in their eyes, thats how they see earths magnetic feild.

disadvantages:

 * If birds are near magnets then it interferes with the magnets inside of them.
 * Homing pigeons get mixed signals from their beaks so they might go to the Geographic north pole or they might go to the magnetic north pole



= Personal Experiences = We all think that magnetism is very important for birds to have because if they didn't, then they would never know to go south for the winter because they would not know were south is. Also, they wouldn't be able to find food so overall birds wouldn't be able to survive. Also baby turtles have to find their way to the sea when they are born, they can't see very well and they depend on the magnetism to find their way. So if they didn't have magnetism they would just wonder and their predators like crabs and birds will eat them up! Birds and sea turtle are very lucky to have magnetism inside them even if sometimes the do get mixed up.

= Works Cited: = Nationalgeographic.com. national geographic society, n.d. Web. 20 Feb. 2013.  //.// WebEcoist.com. N.p., n.d. Web. 20 Feb. 2013. . www.npr.org//. Joe Palca, n.d. Web. 2 Mar. 2012.  .