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Above-Ground Storage Tank Design Project

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At this point in the unit, students have learned about Pascal's law, Archimedes' principle, Bernoulli's principle, and why above-ground storage tanks are of major concern in the Houston Ship Channel and other coastal areas. In this culminating activity, student groups act as engineering design teams to derive equations to determine the stability of specific above-ground storage tank scenarios with given tank specifications and liquid contents. With their floatation analyses completed and the stability determined, students analyze the tank stability in specific storm conditions. Then, teams are challenged to come up with improved storage tank designs to make them less vulnerable to uplift, displacement and buckling in storm conditions. Teams present their analyses and design ideas in short class presentations.

Material Type: Activity/Lab

Authors: Emily Sappington, Mila Taylor

Acoustic Mirrors

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Students play and record the “Mary Had a Little Lamb” song using musical instruments and analyze the intensity of the sound using free audio editing and recording software. Then they use hollow Styrofoam half-spheres as acoustic mirrors (devices that reflect and focus sound), determine the radius of curvature of the mirror and calculate its focal length. Students place a microphone at the acoustic mirror focal point, re-record their songs, and compare the sound intensity on plot spectrums generated from their recordings both with and without the acoustic mirrors. A worksheet and KWL chart are provided.

Material Type: Activity/Lab

Authors: Nick Breen, Steven C. Thedford

Got Lactose? Investigating How Enzymes Function

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After studying the basics of enzyme function, students will be exposed to the history and evolution of lactose intolerance/lactase persistence. Both whole group and individual activities will ask students to interact with the concept. They will conduct a lab to understand the role of enzymes in lactose digestion and communicate their knowledge by creating a public health poster.

Material Type: Activity/Lab, Assessment, Data Set, Lesson, Lesson Plan, Student Guide

Author: Janelle Roberts

Iowa History: Iowa Unsung Prairie Transformation to Farms and One Room Schools 1870-1900 Part 1

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Learn more about how immigrants settled Iowa by developing farms and built schools on the tall grass prairie in Iowa. Through video, primary sources, activities and text learn more about: A) Preparation for Settlement of Iowa's Treeless Tall Grass Prairie B) Promotion of Large Scale Prairie Settlement of 3/4 of Iowa

Material Type: Lesson, Module, Primary Source, Unit of Study

Authors: Denise Krefting, Sandra Host