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.
Article about Michele Cross's upcoming PolarTREC Expedition with Stacy Kim and the SCINI ROV team in Antarctica. Ms. Kingsley encourages others to follow the expedition online and through the newspaper, as she hopes to post updates throughout the expedition.