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Alligators and Crocodiles: Can You Tell the Difference

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1 Alligators and Crocodiles: Can You Tell the Difference
Alligators and Crocodiles: Can You Tell the Difference? 4th Grade Language Arts and Science Integrated Lesson Stephanne Marsh EDN 303 October 28, 2011 UNCW Skip Intro Quit

2 NC SCOS Standards 4th Grade
Language Arts: Interact with the text before, during, and after reading, listening, and viewing by: making predictions. formulating questions. supporting answers from textual information, previous experience, and/or other sources. drawing on personal, literary, and cultural understandings. seeking additional information. making connections with previous experiences, information, and ideas. 2.03 Read a variety of texts, including: nonfiction ( autobiographies, informational books, diaries, journals). 2.06 Summarize major points from fiction and nonfiction text(s) to clarify and retain information and ideas. Science: Observe and record how animals of the same kind differ in some of their characteristics and discuss possible advantages and disadvantages of this variation. Skip Intro Quit Forward Back Menu/Site Map

3 Alligators and Crocodiles MENU
Title Page: Slide 1 NCSCOS Standards: Slide 2 Table of Contents: Slide 3 Similarities of Alligators and Crocodiles: Slides 4-8 Differences of Alligators and Crocodiles: Slides 9-11 Assessment for Alligators and Crocodiles: Slides 12-26 Post Assessment - Reinforcing, Re-teaching: Slides 27-28 References : Slide 29 Exit: EXIT

4 Alligators and Crocodiles
Interesting trivia: All alligators are crocodiles, but not all crocodiles are alligators. Alligators and Crocodiles are both members of the reptilian order CROCODYLIA, they just belong to different families. Quit Forward Back Menu/Site Map

5 Alligators and Crocodiles
Alligators belong to the Alligatoridae family. Crocodiles belong to the Crocodylidae family. Both Alligatoridae (Alligators) and Crocodylidae (Crocodiles) belong to the CROCODYLIA order. Quit Forward Back Menu/Site Map

6 Alligators and Crocodiles
Plain English: Pretend your last name is Jones. Your mom’s last name is Davis-Jones. Your aunt, or your mom’s sister’s last name, is Davis-Smith. They are still sisters, they just have different names, because they belong to different immediate families. Their ORDER (Davis) is still the same, because they are sisters. Quit Forward Back Menu/Site Map

7 Alligators and Crocodiles
Interesting Similarities & Facts About Crocodilians: Crocodilians (alligators and crocodiles) go back 250 million years! They were around during the dinosaur age, but they survived! Crocodilians are both adapted to life on land and water. Crocodilians swim up to 20 miles per hour (mph). Crocodilians run up to 11 mph. Crocodilians hold their breath for up to 1 hour! Crocodilians have eyes on top of their heads. Quit Forward Back Menu/Site Map

8 Alligators and Crocodiles
Crocodilians have powerful tails that propel them through the water. Crocodilians will eat just about any animal. Crocodilians use their teeth to spear food and do not need to chew! Crocodilians can go up to a year without eating! Crocodilians have slits for ears, but their hearing is very sensitive. Crocodilians have a limitless supply of teeth. If one falls out, they can re-grow another. Forever! Quit Forward Back Menu/Site Map

9 Alligators and Crocodiles
Interesting Differences & Facts About Crocodilians: Alligators live mostly in freshwater swamps, lakes and slow-moving streams in the Southeastern United States, South America and China. Crocodiles have a wider range, but prefer saltier water. They are located in Africa, North America, South America and Asia. FACT: The only location or place in which you will find BOTH alligators AND crocodiles is at the southern tip of Florida. Quit Forward Back Menu/Site Map

10 Alligators and Crocodiles
Crocodiles have a “V” shaped snout. Alligators have a “U” shaped snout. Crocodiles: both upper and lower teeth are visible when it’s mouth is closed. Alligators: only upper teeth are visible when their mouths are closed. Quit Forward Back Menu/Site Map

11 Alligators and Crocodiles
Both crocodiles and alligators have small pits or sensory organs called dermal pressure receptors (dots) in their skin. These sensory receptors help them track prey in the water. The alligator only has these “dots” on it’s jaw. The crocodile has these dots all over it’s body. Quit Forward Back Menu/Site Map

12 Can You Tell? Alligator or Crocodile?
Only 1 Row of Teeth!! 2 Rows of Teeth!! Quit Forward Back Menu/Site Map

13 Your Turn! Alligator or Crocodile?
Alligator Bellow ALLIGATOR Quit Forward Back Menu/Site Map

14 Your Turn! Alligator or Crocodile?
Crocodile Growl CROCODILE Quit Forward Back Menu/Site Map

15 All alligators are crocodiles but not all crocodiles are alligators.
Your Turn! Assessment All alligators are crocodiles but not all crocodiles are alligators. TRUE or FALSE Quit Forward Back Menu/Site Map

16 Sorry! That is incorrect. Please try again.
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17 Congratulations! That is CORRECT! Quit Forward Back Menu/Site Map

18 2. Alligators and crocodiles belong to the same order, Crocodylia.
Your Turn! Assessment 2. Alligators and crocodiles belong to the same order, Crocodylia. TRUE or FALSE Quit Forward Back Menu/Site Map

19 Sorry! That is incorrect. Please try again.
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20 Congratulations! That is CORRECT! Quit Forward Back Menu/Site Map

21 How long have crocodilians been around?
Your Turn! Assessment How long have crocodilians been around? 65 million years 6,000 years 250 million years Quit Forward Back Menu/Site Map

22 Sorry! That is incorrect. Please try again.
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23 Congratulations! That is CORRECT! Quit Forward Back Menu/Site Map

24 Your Turn! Assessment Alligators live in freshwater and crocodiles live primarily in saltier water. True or False Quit Forward Back Menu/Site Map

25 Sorry! That is incorrect. Please try again.
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26 Congratulations! That is CORRECT! Quit Forward Back Menu/Site Map

27 All alligators are crocodiles, but not all crocodiles are alligators.
Reinforcement All alligators are crocodiles, but not all crocodiles are alligators. Alligators and Crocodiles are both members of the reptilian order CROCODYLIA. Quit Forward Back Menu/Site Map

28 Crocodilians have been around for 250 million years.
Reinforcement Crocodilians have been around for 250 million years. Alligators live in fresh water and crocodiles live primarily in saltier water. San Diego Zoo Fast Facts Alligator and Crocodile Video Quit Forward Back Menu/Site Map

29 References Quit Forward Back Menu/Site Map
NCDPI. (n.d.), 4th Grade Language Arts and Science Standards. Retrieved October 20, 2011 from: National Geographic. (n.d.), American crocodile. Retrieved October 28, 2011 from: San Diego Zoo. (n.d.), Quick facts: reptiles alligator and crocodile. Retrieved October 19, 2011 from: You Tube. (n.d.), Alligator bellow. Retrieved October 28, 2011 from: You Tube. (n.d.), Crocodile howl. Retrieved October 28, 2011 from: Quit Forward Back Menu/Site Map

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