Unit 4: Oceans in Peril: Pressures on Ocean Ecosystems
Students will read and summarize an article that details scientific studies on behavioral changes of gray whales. Discussed are their feeding behavior, migratory behavior, and breeding patterns in the Pacific. Students will examine the whales' responses and discuss in small groups how the responses relate to climate change. By interpreting potential links between gray whale behavior and changed ocean conditions, students will be able to infer the ecological role that gray whales play within a community and an ecosystem. Students will summarize the main concepts, scientific evidence, data and observations cited, and justify why gray whales can be considered "ecosystem sentinels."
By the end of the unit, students will be able to:
- Describe the most common data sets and principles used to study climate change, including global temperatures, atmospheric carbon dioxide levels, warming ocean temperatures, melting glaciers and sea ice, and rising sea levels, and identify scientific data and evidence as distinguished from interpretations.
- Cite evidence related to climate change that affects systems on the organismal and ecosystem level, using examples from a provided article about gray whales.
- Correlate scientific evidence and possible interpretations related to gray whale behaviors and climate change.
This unit directly supports multiple InTeGrate guiding principles and addresses grand challenges by introducing students to ecosystem approaches to studying climate change, exploring peer reviewed literature, and encouraging interpretation of real scientific evidence.
Context for Use
Description and Teaching Materials
For homework, students will read and summarize an article that is based on a passage from a peer-reviewed article, "Marine Mammals As Ecosystem Sentinels," and complete the worksheets included with the article. Then, in class they will review a PowerPoint, "Gray Whales As Sentinels," with the instructor covering basic principles of the article. Students divide into groups of 3–4 for a gallery walk (learn more about gallery walks) using the information completed during the homework assignment, and describing the major cited evidence linking gray whales and climate change, and identifying scientific interpretations related to the evidence from the article. Students report the results of the gallery walk orally to their group.
- Homework Assignment Reading and Worksheet: (Word Document) Homework Reading & Worksheet (Microsoft Word 2007 (.docx) 1.8MB Oct26 16) ; Homework Assignment (PDF Document) Homework Reading & Worksheet (Acrobat (PDF) 4.6MB Oct26 16)
- Homework Teacher Key:
Classwork (49 min total)
- Review of homework and Introductory PowerPoint, Gray Whales As Sentinels PowerPoint (PowerPoint 2007 (.pptx) 4.8MB Oct26 16) (9 min)
- Gallery Walk — Word version Gallery Walk Instructions Word (Microsoft Word 2007 (.docx) 36kB Oct26 16) , pdf version Gallery Walk Instructions Pdf (Acrobat (PDF) 123kB Oct26 16) (32 min)
- Wrap up/Assessment (8 min)
- Station Instructions (to print and post at each station for student reference): Word version Gallery Walk Instructions for Stations (Microsoft Word 2007 (.docx) 29kB Oct26 16) PDF version Gallery Walk Rotation Instructions pdf (Acrobat (PDF) 67kB Oct26 16)
The gallery walk works best in small groups (5–6) students for four stations. For classes larger than 24 students, teachers should set up more than one set of posters for the gallery walk (8 min per station, depending on student involvement and need for comments = 32 minutes). For very large classes (approaching 100 students), instructors can utilize a "virtual gallery walk" where the students stay in the same location for small group work, and during each rotation, every student rotates to the next task without physically changing location.
** The stations will not need the same amount of time. The first three rotations require more group conversation and time to write lengthy responses on the posters. The last station is agree/disagree and comment, and can be shortened for time constraints.
Teaching Notes and Tips
Each station of the gallery walk needs a large, poster-sized piece of paper, a pack of colored markers, and method of attaching the poster to the wall.
During the gallery walk, instructors should check in with groups early in the rotations, after students have attempted to link interpretations with evidence (after Rotation 2). Accuracy at this stage is key to the continued comments and summary of the stations. If the students need adjustments or assistance in their interpretations, the instructor may give prompts or suggestions for the groups to consider.
Instructors can prepare the posters with labels and headings to save time if so desired.
The Gallery Walk In Depth Instructions and Key for Teachers has two sections that are similar, Group Rotation and Station Rotation. It is suggested that instructor print a copy of the Station Rotation section to be placed at each station for students to have as confirmation of oral instructions during gallery walk activity.
This assessment is provided for use after teaching the unit and is optional. Instructors can assign the Assessment included here, or use the format as examples of questions for incorporating into testing procedures.
- Assessment Questions: Word version Unit 4 Assessment (Microsoft Word 2007 (.docx) 27kB Oct26 16) PDF version Assessment pdf version (Acrobat (PDF) 61kB Oct26 16)
- Assessment Teacher Key:
- Assessment Rubric: Word version Unit 4 Assessment Rubric Word Version (Microsoft Word 2007 (.docx) 29kB Oct30 16) PDF version Unit 4 Assessment Rubric pdf Version (Acrobat (PDF) 375kB Oct30 16)
References and Resources
- Journal Article: Moore. S.E. 2008. "Gray whales as ecosystem sentinels." Journal of Mammalogy. 89(3) 534–540.
- Newsletter Article: Impact of Climate Changes on Gray Whale Feeding Grounds Tracked with GIS. esri ArcWatch. October 2007.