Read about Emma's problem. Ducks stay dry with feathers. How could Emma copy ducks to stay dry?
- Ducks have feet that splash water → copying feet would help Emma run faster in rain.
- Ducks have feathers that make water roll off → copying that coating would help Emma's coat stay dry. (correct answer)
- Ducks have wings that flap air → copying wings would help Emma blow rain away.
- Ducks have feathers that soak up water → copying feathers would help Emma hold more rain.
Explanation: This question tests the skill from 1-LS1-1, where we use materials to design solutions to human problems by mimicking how animals use their external parts to survive, grow, and meet their needs, specifically identifying the problem and the nature-inspired solution. Biomimicry means copying nature to solve human problems, as animals and plants have external parts on the outside of their bodies that help them survive and meet their needs. Scientists and engineers study how these parts work and design solutions that copy them, like how duck feathers are waterproof so ducks stay dry, inspiring raincoats that keep humans dry; gecko feet are super sticky for climbing walls, leading to grippy gloves; and burr hooks catch on fur to spread seeds, which inspired Velcro for fastening things. Emma's problem is getting wet in the rain because her coat soaks through, and ducks solve a similar problem using their feathers, which have a coating that makes water roll off, helping the ducks stay dry and warm in water. The correct answer says 'Ducks have feathers that make water roll off → copying that coating would help Emma's coat stay dry,' which accurately identifies how the animal's external part works and connects it to solving Emma's problem by mimicking the waterproof mechanism. A distractor like 'Ducks have feathers that soak up water → copying feathers would help Emma hold more rain' is wrong because it describes the wrong function of the feathers and reverses the mechanism, suggesting absorption instead of repelling; students might choose this if they confuse how feathers work or focus on irrelevant facts without understanding the survival mechanism. To teach this, help students see the biomimicry pattern: identify the human problem, find an animal with a similar need, look at its external part, understand how it works, and copy the mechanism in a design, using examples like ducks' waterproof feathers for raincoats. Emphasize focusing on how the part works, not just naming it, and show real examples to avoid thinking biomimicry means becoming like the animal.