Back-of-the-Envelope Calculations: Height of the Himalayas part of Quantitative Skills:Activity Collection
Barb Tewksbury, Hamilton College

Kepler's Third Law - The Equation part of Quantitative Skills:Activity Collection
Len Vacher, University of South Florida
In this module, students are asked to devise a simple relationship between the sidereal period and orbital radius.

Genetic and Empirical Approaches to Classifying Climates part of Quantitative Skills:Activity Collection
Charles Dodd, Shoreline Community College
Students (in groups of 3-4) are given a hypothetical planet and create a genetically based climate regionalization. Students then interpret empirical data of various climate phenomena (precipitation, temperature, evapo-transpiration) from different locations on the planet, and apply these to the Koppen system of climate classification.

Here we see it, but what's beneath? Effective geologic cross-section problem solving part of Quantitative Skills:Activity Collection
Rob Benson, Adams State University
Students will use suface observations from a map to locate subsurface features using geologic cross-sections using topographic profiles, surface data, assessment of variables and data quality. Students will produce a standard scientific report describing the nature and conclusions of the project.

Westward Ho! How Far is Yonder Mountain part of Quantitative Skills:Activity Collection
Len Vacher—University of South Florida, Tampa FL 33620 This activity was developed for Spreadsheets Across the Curriculum. National Science Foundation, DUE 0442629.
PowerPoint module leading students through development of a spreadsheet to calculate the distance of a mountain peak from coplanar vertical angles shot from two points a known distance apart.

GEOLogic: State Fossils part of Quantitative Skills:Activity Collection
Laura Guertin, Penn State Brandywine
Students are asked to identify states with their state fossil and the year in which it was declared, based on clues given from various points of view.