The surface area-to-volume relationship is important for the function of both living things (ex: lung anatomy, tree roots, cell size, brain vascularization) and many human-made objects (ex: car radiators, air conditioning units). By understanding that surface area increases at a slower rate than volume as objects get larger, students can appreciate: why small cell size is advantageous; why plants benefit from a branched network of stems, leaves and roots; and why a variety of everyday objects are shaped and sized the way they are.
In this module, students learn: 1) About the relationship between surface area and volume, 2) Why this relationship is important for cells in our body.
This modules is designed as an introduction to understanding topographic maps and GIS using Google Earth. Students perform a computer lab activity to learn how to read topographic maps, measure geographical features, and use geographic information systems (GIS).
Keywords: argument, communication, contour, data, HS-ESS3.A, HS-ESS3.C, HS-ETS1.B, HS-ETS1.C, explanations, GIS, Google Earth, investigations, mapping, patterns, scale, systems
In this lab, students learn how to think about what makes the energy in vegetable oil available to use for vehicle engines. They learn about the chemical reactions that produce biodiesel, and why these chemical reactions are needed to produce vehicle-ready fuel. They practice making biodiesel, and compare the results when they use different amounts of catalyst, and when they use either new or used vegetable oil.