PowerPoint introducing the concept of surface area to volume ratio in biology. Contains a few questions about what organisms exchange and why, but then includes a video about bats and surface area to volume ratio (i then ask my students a question about oxygen uptake and mass of organisms a few lessons later, and remind them of this video as a clue when they get stuck!). However, as with all my resources, this is designed to be used with the class notes for this topic, which requires students to calculate S.A.:vol ratios and plot the data on a graph, before answering a few questions. I would be cautious about purchasing this and expecting to use it to deliver a good lesson if not using the work sheet. I have however included another activity and marking guidelines for an activity on S.A.:Vol.
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