Build the Right Bear

Turn bear size into an adaptation design challenge.

Give students four habitat cards:

• Arctic Sea Ice
• Salmon River Coast
• Tropical Forest
• Mountain Forest

Then give them adaptation cards:

• Huge body
• Thick fat layer
• Long claws
• Large paws
• Strong climbing ability
• Shorter body
• Powerful smell
• High-fat diet
• Flexible omnivore diet
• Dense fur
• Fast movement through trees

Students must “build” the best bear for each habitat. They choose five adaptations and explain why those traits fit the environment.

Example:

Arctic Sea Ice Bear: huge body, thick fat layer, large paws, dense fur, high-fat diet.
Why: This bear needs to stay warm, walk on ice, swim, and survive on seal fat.

Tropical Forest Bear: smaller body, strong climbing ability, long claws, flexible diet, powerful smell.
Why: This bear needs to move through trees, find insects and fruit, and avoid overheating.

Would a polar bear body work in a tropical forest? Would a sun bear body work on Arctic ice? Why not?

That is where students see that size is not about being “better.” It is about being built for the job.