How do Antarctic animals stay warm in bone-chilling water?
1. Discuss how quickly our bodies are chilled in cold water. What do we do to stay warm? (move around, wear insulating wetsuits, get out of the water). 2. Ask students to list ways in which animals are able to stay warm in cold water (blubber, air in feathers, oil on fur, low surface area to volume ratio). 3. Have the students cover one hand with a plastic bag. 4. Put a generous amount of solid shortening into another bag. Have the student put the plastic-covered hand into the bag with the shortening. Knead the shortening to make sure the hand is completely surrounded by shortening. 5. Wrap duct tape around the portion of the bag covering your wrist to seal the bag (optional). 6. Cover the other hand with two plastic bags (without shortening). This is the “control.” 7. Place both hands simultaneously into a bucket of cold water. 8. Have a student time how long each hand remains underwater. 9. Whales, Weddell seals, and penguins all have blubber. Discuss how the solid shortening is like
