The Changing Geographic Distribution of Malaria with Global Climate Warming part of Quantitative Skills:Activity Collection
Mary Savina, Carleton College; Kendra Murray, The University of Arizona
In this exercise, students analyze climate data to find areas in the southern United States that are now close to having conditions in which the malaria parasite and its mosquito hosts thrive and then attempt to forecast when areas might become climatically suitable.

What is the fate of CO2 produced by fossil fuel combustion? part of Quantitative Skills:Activity Collection
Paul Quay
A box model is used to simulate the build up of carbon dioxide in the atmosphere during the industrial era and predict the future increase in atmospheric CO2 levels during the next century.

Three-Point Problem by Simultaneous Linear Equations part of Quantitative Skills:Activity Collection
William Frangos, James Madison University
Students are introduced to the use of linear algebra in an intuitive and accessible way, through classroom activity and homework set. The familiar three-point problem is cast in terms of three dimensional analytic geometry, fostering understanding of mathematical models for simple geometric forms.

Reading Topographic Maps and Calculating Map Scale part of Quantitative Skills:Activity Collection
Leslie Kanat, Johnson State College
Use a topographic map to deliniate a watershed, draw a map bar scale, and calculate a map ratio scale.

Toilet Paper Analogy for Geologic Time part of Quantitative Skills:Activity Collection
Jennifer Wenner, University of Wisconsin-Oshkosh
An in class demonstration of the vastness of geologic time using a 1000-roll sheet of toilet paper and unrolling it around the room.

GEOLogic: The Big Five Mass Extinctions part of Quantitative Skills:Activity Collection
Laura Guertin, Penn State Brandywine
Students are asked to match up the five largest mass extinction events with their relative dates, approximate duration, and severity (percentage of species that became extinct) based on clues given from various perspectives.

The Floating Lithosphere - Isostasy part of Quantitative Skills:Activity Collection
Len Vacher, University of South Florida
Students are asked to numerically and then analytically determine the relations governing the depth of compensation.

Angle of Repose part of Quantitative Skills:Activity Collection
Eric Baer, Highline Community College
A student activity to determine the angle of repose and what factors determine the angle of repose.

Air-sea Interactions: Activities in Oceanography part of Quantitative Skills:Activity Collection
Steve LaDochy, California State University-Los Angeles
This online set of activities help students learn properties of ocean waves, wind-wave relationships and properties of tsunamis.

Driving Through Geologic Time - An analogy part of Quantitative Skills:Activity Collection
Eric Baer, Highline Community College
An analogy of the Earth's history to a cross-country drive.