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GRADE LEVEL: 9-12
TIME ALLOTMENT: Two or three 45-minute class periods
OVERVIEW: Using segments from the PBS series Nature episode, Invasion of the Giant Pythons, students will explore pythons and their impact on other species. In the Introductory Activity, students will learn about python digestion and unscramble photos illustrating a python’s digestion of prey. In the Learning Activity, students will learn how pythons have migrated to new environments and the dangers they pose to other species. Students will learn how invasive species, such as pythons, can threaten native species. In the Culminating Activity, students will learn about the Key Largo woodrat and ways scientists are trying to protect the species from pythons. Students will then explore a native species in their own region and create a presentation about the species, how it is being threatened, and efforts to protect it.
SUBJECT MATTER: Science
Students will be able to:
- Explain where pythons live and how they have moved from one environment to another.
- List python prey and discuss the process by which pythons capture and digest food.
- Describe dangers pythons pose to native species.
- Discuss efforts to rescue the Key Largo woodrat and the reasons why scientists are launching these efforts.
- Discuss one endangered or threatened local species and efforts being taken to help that species.
Content Standard C: Life Science
Fundamental concepts and principles that underlie this standard include:
- The Interdependence of Organisms
- Organisms both cooperate and compete in ecosystems. The interrelationships and interdependencies of these organisms may generate ecosystems that are stable for hundreds or thousands of years.
- Living organisms have the capacity to produce populations of infinite size, but environments and resources are finite. This fundamental tension has profound effects on the interactions between organisms.
- Human beings live within the world’s ecosystems. Increasingly, humans modify ecosystems as a result of population growth, technology, and consumption. Human destruction of habitats through direct harvesting, pollution, atmospheric changes, and other factors is threatening current global stability, and if not addressed, ecosystems will be irreversibly affected.
Invasion of the Giant Pythons, selected segments
Clip 1: Dinner Time
An overview of how a python captures and digests its prey.
Clip 2: It’s Raining Pythons
A close look at how pythons have entered new environments
Clip 3: Beware: Pythons
A description of the dangers that pythons pose to other species.
Clip 4: Saving the Rats
A look at efforts to protect the Key Largo woodrat from pythons.
Access the streaming and downloadable video segments for this lesson at the Video Segments Page.
Invasion of the Giant Pythons/ Photos:
These pages on the Nature website illustrate the process by which a python digests its prey. These images can be used in the Introductory Activity.
This website includes a variety of information about endangered species. The “Species Search” page, used in the Culminating Activity, features a US map where visitors can locate endangered plant and animal species throughout the country.
Optional (for research in Culminating Activity):
This website includes a variety of information about the Everglades, including facts about plants and animals:
This website contains information about invasive species in California and efforts being taken to reduce their negative effects on native species and environments.
- South Florida Natural Resources Center/ Everglades National Park: Natural Resources Management/ Burmese Pythons
This fact sheet provides detailed information about Burmese pythons and efforts underway to monitor and control the python population.
For the class:
- Computers with internet access
- Computer, projection screen and speakers (for class viewing of online/downloaded video segments)
- One copy of the “Python Digestion Game” answer key (download here)
For each pair of students
- 1 copy of the “Python Digestion Game” (download here)
PREP FOR TEACHERS
Prior to teaching this lesson, you will need to:
Preview all of the video segments and websites used in the lesson.
Download the video clips used in the lesson to your classroom computer(s) or prepare to watch them using your classroom’s Internet connection.
Bookmark any websites that you plan to use in the lesson on each computer in your classroom. Using a social bookmarking tool such as del.icio.us or diigo (or an online bookmarking utility such as portaportal) will allow you to organize all the links in a central location.
Print out one copy of the “Python Digestion Game” for each pair of students. If desired, cut the cards along the dotted lines prior to the class and paper clip each set of 6 cards together. If you do not pre-cut the cards, provide students with scissors to cut out the cards themselves.
Print out one copy of the “Python Digestion Game” answer key.
NEXT: Proceed to Lesson Activities