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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.

Back-of-the-Envelope Calculations: Percentage of Copper in Ore part of Quantitative Skills:Activity Collection
Barb Tewksbury, Hamilton College
Question Suppose that you are building a new house. It will take about 90 kg (198 pounds) of copper to do the electrical wiring. In order to get the copper in the first place, someone needs to mine solid rock that ...

Back-of-the-Envelope Calculations: Spacecraft Acceleration part of Quantitative Skills:Activity Collection
Barb Tewksbury, Hamilton College
Question Suppose someone offered you a ride to the nearest star in a new spacecraft that could travel at half the speed of light, or about 150,000 km/second. In order to reach such a cruising speed, you and the ...

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

Back-of-the-Envelope Calculations: Scale of the Himalayas part of Quantitative Skills:Activity Collection
Barb Tewksbury, Hamilton College
Question Let's imagine a scale model of the Earth, and let's imagine that the Earth is the size of a basketball. Suppose that you wanted to build the Himalayas to scale on the surface of the basketball. ...

How Big is a Trillion? part of Pedagogy in Action:Library:Teaching Quantitative Reasoning with the News:Examples
Stuart Boersma, Central Washington University
Perhaps the first skill needed for successful quantitative reasoning is the ability to understand a single number. Newspaper headlines over the last year have used some amazingly large figures when discussing the ...

Choosing Between Home Appliances: Benefits to the Planet and Your Wallet part of SISL:2012 Sustainability in Math Workshop:Activities
Corri Taylor, Wellesley College
Students research various options for new appliances and make purchasing decisions based not merely on purchase price, but also on energy efficiency, which has implications for the planet AND for longer-term personal finances. Students calculate the "payback period" for the more energy efficient appliance and calculate long-term savings.

Economics of installing Solar PV panels: is it worth it to the individual? part of SISL:2012 Sustainability in Math Workshop:Activities
Martin Walter
We show that it is economical for an individual to install solar photovoltaic panels in Denver, Colorado; and this is a sustainable strategy for society at large.

Energy Cost of Engine Idling part of SISL:2012 Sustainability in Math Workshop:Activities
Ben Fusaro
This is an open-ended but elementary modeling exercise about idling energy behaviors and impacts.

Simple Population Space Usage part of SISL:2012 Sustainability in Math Workshop:Activities
Bill Bauldry
Students find current values for world and US populations, the area of Texas, and the size of the average house in the USA. Students then look at ratios to assess land usage.

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