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Published on October 12, 2007

Author: Mahugani

Source: authorstream.com

Slide1:  Science Third Grade Miss Colleen Nann All About Alligators and Crocodiles Subject: Science Grade: 5th Slide2:  Today you will be completing an Interactive Power Point Lesson about alligators and crocodiles. You will be presented with information about their characteristics, similarities and differences. First, complete the lesson about alligators and then complete the section about crocodiles. When you are finished please complete the multiple choice quiz. Follow directions and enjoy! Introduction… How To Navigate…:  How To Navigate… This button will always lead you to the next slide. This button will always lead you to the previous slide. This button will always lead you to the main menu slide. Welcome to the Main Menu!:  Welcome to the Main Menu! Click here to learn about American Alligators! Click here to learn about American Crocodiles! Click the ? button to take the QUIZ!! Slide5:  American Alligators have survived unchanged since the time of the dinosaurs, 65 million years ago. Despite their size and look, Alligators are extremely fast and can reach 20 mph! Although their large, sharp teeth are quite scary, alligators have a natural fear of man and will attack only if provoked. Slide6:  How did the alligator get it’s name? Years ago, when the Spaniards first arrived they encountered a large and interesting looking reptile. They referred to it as “el lagarto” which means “the lizard”. Today we call the creature alligator, our interpretation of the Spaniard’s original name. A Great Comeback!:  A Great Comeback! Long ago, Alligators were hunted almost to the point of extinction; mostly for their skin, used for clothing and musical instruments, and their meat. Also, when people saw their rough skin, they believed them to be immune to snake bites. They were hunted for their “magical teeth” which people believed would ward off snake bites! Since then they have made a remarkable comeback, their numbers have settled at a safe level. Slide8:  The American Alligator… * Has a short, blunt and rounded snout. * Adults are grayish black in color but young gators have yellow and white highlights on a black body Slide9:  Alligators are usually 12 - 13 ft in length and weigh 600 lbs or more. In the year 1900 in Louisiana the largest length was recorded: 19 feet 2 inches. They usually live 35-50 years in the wild and 60-80 years in captivity. Some Facts… Want to hear what an alligator sounds like?:  Want to hear what an alligator sounds like? Alligators roar and snort to establish dominance and scare away predators and other pests. Click the link below to explore several samples of gator noises. Gator Noises! Slide11:  Are found in the South Eastern U.S.- highest populations are seen in Louisiana and Florida. Alligators can be found in almost every single body of water in Florida American Alligators Slide12:  Eating Habits Alligators are carnivorous reptiles that feed at night. They swallow their food whole! Small gators eat snails, frogs, insects Large gators eat fish, turtles, snakes, waterfowl, small mammals and even smaller alligators Slide13:  Where do baby alligators come from? The adult female alligator lays 40-45 eggs in a nest and guards it. The eggs will mature for 65 days. It is important that the mother guards the nest against predators, especially raccoons, because an egg can be a tasty snack. Slide14:  Young alligators are called hatchlings. They are 6-8 inches at birth and grow about one foot each year. Their first few years of life are very dangerous. The mother protects them from snakes, wading birds, raccoons and otters for several years. Once the alligator reaches 4 ft, their only predator is man. Slide15:  Gatorland is a theme park and zoo rolled into one! Located in Orlando, Florida- it has been referred to as the “alligator capital of the world”. It features alligators in their natural habitat and provides observation towers and decks so visitors can watch the amazing creatures. Wish you could visit Gatorland right now?! CLCK HERE to view the live web cam! And see the alligators for yourself! In conclusion…:  In conclusion… Alligators are interesting creatures who are harmless as long as they are not bothered or threatened. They have a natural fear of man. It is illegal to feed alligators because they should not associate man with food. They do NOT make good pets. You have now completed the section of the Interactive Power Point Lesson about alligators. Please click the home button to return to the main menu. Slide17:  The American Crocodile Slide18:  American Crocodiles can be traced back to the end of the Triassic period, 210 million years ago. They are often mistaken for their closely related cousin, the alligator; not only because of their similar appearances but because they are sometimes found in the same location. American Crocodiles are extremely shy and are rarely seen by people. Lets learn some more about these amazing creatures! Slide19:  The American Crocodile is an endangered species. Long ago they were hunted, along with alligators, for their skins and meat. Although their cousin the American Alligator has made a comeback in recent years, and is classified as threatened; the crocodile remains on the endangered species list. Due to the pollution and loss of habitat caused by humans, the American Crocodile’s population is continuing to disappear. The American Crocodile…:  The American Crocodile… * Adults are a gray-green, olive green color. Babies are a light greenish-gray color. * Has a long, slender, tapered snout and their teeth are visible when mouth is closed. * Are less aggressive than alligators. * Are more agile than alligators. Some Facts…:  Some Facts… American Crocodiles range from 7 - 15 feet in length. Any crocodile longer than 12 feet is considered large. They range from 150 - 450 pounds. Their lifespan is 60 - 70 years of age. Want to hear what a crocodile sounds like?:  Want to hear what a crocodile sounds like? Crocodiles grunt, roar and snort to establish dominance and scare away predators and pests. Click on the link below to hear what they sound like! Croc Noises! Slide23:  Where are they located? American Crocodiles can be found where fresh and salt waters mix. For example coastal wetlands and canals. Like their cousin the alligator, they are found in the south of Florida. They can also be found in Central America and some of South America. Slide24:  This graph shows where crocodiles prefer to live. Slide25:  Eating Habits! Adult American Crocodiles eat crabs, fish, waterfowl, turtles, and small mammals. Babies eat water insects and shellfish. Slide26:  Crocodiles come from eggs! The mother buries and guards the eggs to protect them from birds, snakes and other crocodiles who may want to eat the eggs. Once they hatch in July or August the Mother carries the babies to the water. Crocodiles can lay eggs when they reach adulthood, about 10 years old. The female lays and buries 35-50 eggs in April or May. Slide27:  An illustration of a mother crocodile carrying her recently hatched babies to the water in her mouth. And then what?:  And then what? When the baby crocodiles are born they are 8-10 inches long. Although the mother crocodile guarded the nest and carried the babies to the water, she does not continue to protect them. Most are eaten by birds, snakes and other crocodiles before they reach adult size. crocodile puzzle!:  crocodile puzzle! Want to learn more about crocodiles? Check out the clickable croc. Click on it’s features to learn more about them! CLICK HERE for the clickable croc! Want to complete a fun crocodile puzzle? Then click on the link below… You have completed the crocodile section of the interactive power point lesson. Please click the home button to return to the main menu. 1. Which most accurately describes The Adult American Alligator’s diet?:  1. Which most accurately describes The Adult American Alligator’s diet? A B C D Please click on the letter above of the answer you choose. Garbage, aquatic plant life, and tree bark at sunrise Lions, tigers, and bears in the afternoon Fish, turtles, and snakes at night Mud, other adult alligators, and tree leaves when the moon is full Wrong! Your answer is incorrect! Please return to the question slide and try again.:  Wrong! Your answer is incorrect! Please return to the question slide and try again. 2. Crocodiles differ from Alligators because they::  2. Crocodiles differ from Alligators because they: Enjoy the company of humans and make great pets. Have longer, slender snouts and their fourth tooth is visible with their mouth closed. Migrate North during the month of January. Perform for audiences and can do amazing tricks! A B C D Please click on the letter above of the answer you choose. Wrong! Your answer is incorrect! Please return to the question slide and try again.:  Wrong! Your answer is incorrect! Please return to the question slide and try again. 3. The American Alligator were hunted almost to the point of extinction for their::  3. The American Alligator were hunted almost to the point of extinction for their: Feet and tails “Gator eyes” Lucky Tongues Skin and meat Please click on the letter above of the answer you choose. A B C D Wrong! Your answer is incorrect! Please return to the question slide and try again.:  Wrong! Your answer is incorrect! Please return to the question slide and try again. 4. True or False: Adult Alligators and Adult Crocodiles are the same color.:  4. True or False: Adult Alligators and Adult Crocodiles are the same color. True False Please click on the letter above of the answer you choose. A B Wrong! Your answer is incorrect! Please return to the question slide and try again.:  Wrong! Your answer is incorrect! Please return to the question slide and try again. Correct!:  Correct! Yes! That is the correct answer! Click the next button for the next question. Correct!:  Correct! Yes! That is the correct answer! Click the next button for the next question. Correct!:  Correct! Yes! That is the correct answer! Click the next button for the next question. Correct!:  Correct! Yes! That is the correct answer! Click the next button for the next question. Congratulations! You have successfully completed the Interactive Power Point Lesson! Please click the home button so the next user can begin.

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