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 Surface Archaeology Activity will allow you to develop some of the knowledge and skills that archaeologists use to do their work while also getting a chore done at home. The steps are really easy, and then you can decide to maybe tackle another room in the house.