Tips & Modifications
For advanced students, explain the meaning of the levels in the food web illustration:
Level 1 (top-level predator): Animals that are usually not preyed on by other animals as adults.
Level 2 (secondary consumers): Animals that eat animals; animals that eat plants and animals.
Level 3: (primary consumers): Animals that eat plants.
Level 4: (producers): Plants that change energy from the sun into nutrients through photosynthesis.
1. Show students photos of Alaskan brown bears.
Show students the photo gallery of Alaskan brown bears. Read aloud the captions for the class.
2. Introduce the concept of a food web.
Explain to students that because Alaskan brown bears eat so many different foods—both plants and animals—they are at the top of a complex food web. Tell students that food webs show the feeding relationships and flow of energy among organisms in a community. Show students the Brown Bear Food Web illustration. On the board, list any questions they have about the food web.
3. Watch the video.
Watch the Crittercam segments on the brown bear from National Geographic’s Wild Chronicles. Watch carefully for what the bear eats. Ask: How many foods do you count?
4. Divide students into small groups and distribute the worksheet.
Divide students into small groups, and give each a copy of the worksheet Land Animals: Food Web Cards. Ask students to cut and organize the cards into a food web. For the purposes of this activity only, a maximum of two animal consumers were selected for each food card. Have students brainstorm more consumer/producer relationships during a whole-class discussion.
5. Have students recreate the food web through role play.
Assign students particular roles in the web. Have each student wear the appropriate food card as a name tag. Have students organize themselves physically into the food web. Use string of one color to connect the brown bear with its main animal and plant foods. Use other colors to connect each of those foods to the organisms they feed on. Keep connecting consumers and producers until the food web is complete.
Extending the Learning
Have students research different kinds of bears and where they live. Pin images of the bears on a large world map. Or, give students blank outline maps of the world and have them mark the locations.
Subjects & Disciplines
- Biological and life sciences
- define the term
- describe the food web of a brown bear
- organize information to show relationships between consumers and producers in the bears’ food web
- Hands-on learning
- Role playing
- Visual instruction
This activity targets the following skills:
Critical Thinking Skills
What You’ll Need
Materials You Provide
- String (several different colors)
- Transparent tape
The resources are also available at the top of the page.
- Internet Access: Required
- Tech Setup: 1 computer per classroom, Projector, Speakers
- Plug-Ins: Flash
- Small-group instruction
On land, Crittercam reveals the behavior of animals in places or at times when humans cannot easily see or follow them. The Alaskan brown bear is one land animal that Crittercam has been successfully used on. The brown bear eats a wide variety of foods, including both animals and plants.
Recommended Prior Activities
Term Part of Speech Definition Encyclopedic Entry food web Noun
all related food chains in an ecosystem. Also called a food cycle.
Encyclopedic Entry: food web organism Noun
living or once-living thing.
For Further Exploration