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Module 4 • Flora and Fauna: Case Study: Fact Finder
Activity 4-7.2
The Mystery Factor
Activity Level:
explore
Procedure:
Subject Areas:
Part I
English, geography, tech-
nology, visual arts, civics
Before Class: Photocopy Student Page 4-7.2a “Muskoxen Mystery
Story” and Student Page 4-7.2b “Mystery Questions” for each of the
Objectives:
student teams, and one copy of Student Page 4-7.2c “Mystery Fact
Cards” to be cut apart.
Students will:
- Define “limiting factor”
1. Watch “Muskoxen” available in Classroom Movies of the Scrapbook and give examples.
in the Explore section. Share with students that muskoxen are - Work as a group to solve
traced back more than 600,000 years and that fossil evidence sug-
a problem.
gest muskoxen crossed from Chukotka, where Team GoNorth! is
- Demonstrate how global
traveling, to North America some 90,000 years ago with the likes of
climate change acts as a
the wooly mammoth, the saber-toothed cat, and the giant ground
limiting factor.
sloth. Fossil records indicate that muskoxen ranged as far south as
France and Ohio during the last Ice Age.
Time Consideration:
Muskoxen were brought to near extinction by over-hunting dur- 1-2 45-minute periods
ing the late 1800s, at the same period when commercial whaling
supplied North America and Europe with lamp fuel, lubrication,
Materials:
paint, and soap. As a class, brainstorm what extinction is and what
- Teacher Notes 4-7.2
can bring animal populations to extinction. Write the term “limit-
ing factors” on the board and have a brief mind map session with
“Answers for Mystery
students to define limiting factors and to list several limiting factors
Questions”
that affect wildlife populations.
- Student Page 4-7.2a
“Muskoxen Mystery
Examples of limiting factors include food, water, shelter, space,
Story”
disease, predation, climatic conditions, pollution, hunting, poach-
- Student Page 4-7.2b
ing, and accidents. When one or more of these factors exceeds the
“Mystery Questions”
limit of tolerance of that animal, population of animals, or spe-
- Student Page 4-7.2c
cies, it becomes a limiting factor. At that point, it directly affects
“Mystery Fact Cards”
the well-being of that animal, population of animals, or species.
Review how limiting factors may result from natural causes as well
- Student Page 4-7.2d
as human activities, or be a combination.
“Arctic Animals Face
Stress of Warming
Habitat”
- Student Page 4-7.2e
Additional Resources:
“Climate Change Case
Studies”
http://www.hww.ca/hww2.asp?id=95 Muskox – Excellent fact
- Student Page 4-7
sheet on Canadian muskox from Hinterland’s Who is Who. The
“Storyboard”
source of the movie used in this activity.
http://magma.nationalgeographic.com/ngm/0204/feature4/
Vocabulary:
Muskoxen: a Relic of the Pleistocene – A National
limiting factor
Geographic article on Muskoxen.
http://www.wasillachamber.org/webcams/Muskox_frameset.html
Muskox Farm Web Cam – from Wasilla in Palmer, Alaska. Continued on page 28
PolarHusky.com
© NOMADS Online Classroom Expeditions GoNorth! Chukotka 2007 Curriculum 27
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