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Quantitative Skills, Thinking, and Reasoning Activities


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Two streams, two stories... How Humans Alter Floods and Streams
Eric Baer, Highline Community College
An activity/lab where students determine the changes in 100-year flood determinations for 2 streams over time.

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Vectors and slope stability
Eric Baer, Highline Community College
An in-class activity or homework for graphically solving slope-stability problems with vectors.

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Igneous Rock Compositions and Plate Tectonics
Allen Glazner, afg@unc.edu Department of Geological Sciences, University of North Carolina, Chapel Hill, NC Kent Ratajeski, kratajeski@montana.edu Department of Earth Sciences, Montana State University, Bozeman, ...

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How Fast Do Materials Weather?
Rebecca Teed, Wright State University-Main Campus
A think-pair-share activity in which students calculate weathering rates from tombstone weathering data. -

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Carbon Dioxide Exercise
Rebecca Teed, Wright State University-Main Campus
Students work in groups, plotting carbon dioxide concentrations over time on overheads and estimating the rate of change over five years. -

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Analyzing the Antarctic Ozone Hole
LuAnn Dahlman
DATA: Total Ozone Mapping Spectrometer (TOMS) Images. TOOLS: ImageJ, Spreadsheet. SUMMARY: Animate and explore 10 years of Southern Hemisphere ozone images. Then measure and graph the area of the ozone hole over time.

Back-of-the-Envelope Calculations: Weight of Gold
Barb Tewksbury, Hamilton College
Question Let's suppose that you have a shoe box full of water (the box is waterproof, of course). The shoe box weighs about 9 kg (19.8 pounds). Suppose you emptied the box and filled it completely with rock ...

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Estimating Exchange Rates of Water in Embayments using Simple Budget Equations.
Keith Sverdrup, University of Wisconsin-Milwaukee
Simple budgets may be used to estimate the exchange of water in embayments that capitalize on the concept of steady state and conservation principals. This is especially true for bays that experience a significant exchange of freshwater. This exchange of freshwater may reduce the average salt concentration in the bay compared to seawater if it involves addition of freshwater from rivers, R, and/or precipitation, P. Alternatively, it may increase the average salt concentration in the bay compared to seawater if there is relatively little river input and high evaporation, E. Since freshwater input changes the salt concentration in the bay, and salt is a conservative material, it is possible to combine two steady state budgets for a bay, one for salt and one for water, to solve for the magnitude of the water flows that enter and exit the bay mouth. Students will make actual calculations for the inflow and outflow of water to Puget Sound, Washington and the Mediterranean Sea and compare them to actual measured values.

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How Many Is A Million?
Roger Steinberg, Del Mar College
Roger Steinberg, Department of Natural Sciences, Del Mar College Description To help students visualize the immensity of geologic time, or even the immensity of just one million years, I have created a very large ...

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Accessing Streamflow Data via the Worldwide Web
John Pitlick, University of Colorado at Boulder
The objectives of this exercise are to (a) use the worldwide web to access hydrologic data, and (b) compare precipitation/runoff characteristics in different regions of the USA.

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