How do the structures of organisms enable life's functions? Benchmarks for grades 2, 5, 8 and 12 are included.
In this video Paul Andersen explains the importance of scale in science and engineering. The Universe varies in size along three scales: size, timespan, and energy. Many phenomenon are too small and fast, or two large and slow to observe. We use the tools of proportion and units of measure to comprehend different scales. The video ends with a progression of instruction from K-12
Paul Andersen explains how investigations are used by scientists to answer questions and by engineers to test designs. He delineates be investigative and observational science. He demonstrates the formation of a good question the design of an effective investigation.