This lesson focuses on the diffusion of gas molecules across the cuticle membrane of sea spider legs and the role body size plays in the ability of sea spiders to uptake gases. Students construct model sea spider legs of varying diameters and use them to investigate the relationship between surface area-to-volume ratios and diffusion.
The NOAA Teacher at Sea Program sends teachers out to sea on Coast Guard ships. They have published several children's books about the teachers' adventures. The books include basic information about the ships, oceanography, climate, and the environment. Each book has a glossary and is illustrated with beautiful pictures. You can download a pdf copy to use right now and