# Activities

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# Subject: Geoscience

# Quantitative Skills Show all Quantitative Skills

## Estimation

63 matchesResults 1 - 10 of **63 matches**

Back-of-the-Envelope Calculations: Rate of Lava Flow part of Quantitative Skills:Activity Collection

Barb Tewksbury, Hamilton College

Question In 1983, an eruption began at Kilauea Volcano in Hawaii that has proved to be the largest and longest-lived eruption since records began in 1823. Lava has poured out of the volcano at an average rate of ...

Back-of-the-Envelope Calculations: Weight of Gold part of Quantitative Skills:Activity Collection

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 ...

Estimating Exchange Rates of Water in Embayments using Simple Budget Equations. part of Quantitative Skills:Activity Collection

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.

How Fast Do Materials Weather? part of Starting Point-Teaching Entry Level Geoscience:Interactive Lectures:Examples

Rebecca Teed, Wright State University-Main Campus

A think-pair-share activity in which students calculate weathering rates from tombstone weathering data. -

What is the Volume of a Debris Flow? part of Pedagogy in Action:Partners:Spreadsheets Across the Curriculum:Physical Volcanology:Examples

chuck connor, University of South Florida-St. Petersburg

SSAC Physical Volcanology module. Students build a spreadsheet to estimate the volume of volcanic deposits using map, thickness and high-water mark data from the 2005 Panabaj debris flow (Guatemala).

What is the Volume of the 1992 Eruption of Cerro Negro Volcano, Nicaragua? part of Pedagogy in Action:Partners:Spreadsheets Across the Curriculum:Physical Volcanology:Examples

chuck connor, University of South Florida-St. Petersburg

SSAC Physical Volcanology module. Students build a spreadsheet to calculate the volume a tephra deposit using an exponential-thinning model.

How Does Surface Deformation at an Active Volcano Relate to Pressure and Volume Change in the Magma Chamber? part of Pedagogy in Action:Partners:Spreadsheets Across the Curriculum:Physical Volcanology:Examples

Module by Peter LaFemina, Penn State, State College, PA. This cover page by Ali Furmall, University of South Florida, now at University of Oregon.

SSAC Physical Volcanology module. Students build a spreadsheet to examine and apply the Mogi model for horizontal and vertical surface displacement vs. depth and pressure conditions in the magma chamber.

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: Depth of Buried Metamorphic Rock part of Quantitative Skills:Activity Collection

Barb Tewksbury, Hamilton College

Question In many high-grade metamorphic belts around the world, rocks were buried 20-30 km beneath the surface during deformation and metamorphism. How deep is that relative to the cruising altitude of a typical ...

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.