Stephanne Marsh EDN 303 October 28, 2011 UNCW

Alligators and Crocodiles: Can You Tell the Difference?4th Grade Language Arts and Science Integrated Lesson

Stephanne MarshEDN 303October 28, 2011UNCWSkip Intro Quit

NC SCOS Standards 4th GradeLanguage Arts:• 2.02 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:• 1.02 Observe and record how animals of the same kind differ in some of their

characteristics and discuss possible advantages and disadvantages of this variation.

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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

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


• 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


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


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.

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• 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


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.



• 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.



• 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.


Can You Tell? Alligator or Crocodile?

Only 1 Row of Teeth!!

2 Rows of Teeth!!


Your Turn! Alligator or Crocodile?

Alligator Bellow

ALLIGATOR


http://www.youtube.com/watch?v=l3rzkrm98J0

Your Turn! Alligator or Crocodile?

Crocodile Growl

CROCODILE


http://www.youtube.com/watch?v=XEj5imOSJ40

Your Turn! Assessment

1.All alligators are crocodiles but not all crocodiles are

alligators.

TRUE or FALSE


Sorry! That is incorrect. Please try again.


Congratulations!That is CORRECT!



2. Alligators and crocodiles belong to the same order,

Crocodylia.TRUE or FALSE



3. How long have crocodilians been around?

a. 65 million yearsb. 6,000 yearsc. 250 million years



4. Alligators live in freshwater and crocodiles

live primarily in saltier water.

True or False


Reinforcement

• All alligators are crocodiles, but not all crocodiles are alligators.

• Alligators and Crocodiles are

both members of the reptilian order CROCODYLIA.


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 FactsAlligator and Crocodile Video


http://www.sandiegozoo.org/animalbytes/t-crocodile.html

http://video.nationalgeographic.com/video/player/animals/reptiles-animals/alligators-crocodiles/croc_american.html

ReferencesNCDPI. (n.d.), 4th Grade Language Arts and Science Standards.

Retrieved October 20, 2011 from: http://www.ncpublicschools.org/curriculum/

National Geographic. (n.d.), American crocodile. Retrieved October 28, 2011 from: http://video.nationalgeographic.com/video/player/animals/reptiles-animals/alligators-crocodiles/croc_american.html

San Diego Zoo. (n.d.), Quick facts: reptiles alligator and crocodile. Retrieved October 19, 2011 from:http://www.sandiegozoo.org/animalbytes/t-crocodile.html

You Tube. (n.d.), Alligator bellow. Retrieved October 28, 2011 from: http://www.youtube.com/watch?v=l3rzkrm98J0

You Tube. (n.d.), Crocodile howl. Retrieved October 28, 2011 from:http://www.youtube.com/watch?v=XEj5imOSJ40


Stephanne Marsh EDN 303 October 28, 2011 UNCW

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