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Classification? Animals are separated into groups or categories so that they are more easily studied and discussed by scientists and others. Mammals Fish Birds Reptiles Amphibians Mammals Characteristics: Have teeth Have hair Are warm blooded Have a single jaw bone Have inner ear bones Produce milk for their young Mammals Mammals have larger brains and seem to be the most capable learners. All mammalian mothers nourish their babies with milk. Fish Characteristics: Are cold-blooded vertebrates (backbone) Live in water Usually have paired fins, gills, and scales Fish Most fish lay large numbers of eggs, but some have live birth. Most fish breathe by drawing water over four or five pairs of gills. Amphibians Characteristics: Are cold-blooded vertebrates (backbone) Lay their eggs in water Lack any skin coverings such as fur, scales or feathers Amphibians Young amphibians tend to resemble small fish. Amphibian means "two lives," a reference to the change that frogs go through as they move from egg to tadpole to frog. Even as adults, most frogs and other amphibians must stay close to water. Birds Characteristics: Have feathers Lay eggs Have bodies specially adapted for flight Have a beak rather than teeth Birds Their nearly hollow bones provide lightweight strength. Birds now live almost everywhere on Earth. Reptiles Characteristics: Have scales Lay leathery eggs on land Are often called cold-blooded because they can't regulate their own body temperature Reptiles Reptiles do not use energy to fuel internal "furnaces" Although reptiles breathe through lungs, some reptiles can also absorb oxygen in water through their mouth. Resources Quia Classification Quiz Charts: Animal classification, Fish, Bird, Amphibian, Animals, The Animal Kingdom Resources http://www.nmnh.si.edu/BIRDNET/ http://falcon.jmu.edu/~ramseyil/vertebrates.htm http://www.edhelper.com/AnimalReadingComprehension_1_1.html http://www.edhelper.com/animals.htm http://animaldiversity.ummz.umich.edu/site/index.html http://anthro.palomar.edu/animal/links.htm http://www.dowslane.org/reptile.html http://www.seaworld.org/animal-info/animal-bytes/index.htm http://www.hhmi.org/coolscience/critters/critters.html http://www.quia.com/servlets/quia.activities.common.ActivityPlayer?AP_rand =785616651&AP_activityType=14&AP_urlId=1130&AP_continuePlay=true&i d=1130 This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.