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.
This article highlights climate change research on board the USCGC Healy in the spring of 2009 with interest in the role of Deanna Wheeler, PolarTREC teacher on board the ship. There are also short videos embedded within the article.