Quantitative Skills > Teaching Methods > Mathematical and Statistical Models > Mathematical and Statistical Models Exampels

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## Earth System Topics

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Daisyworld: Interactive On-line PC and Mac
Students use a JAVA interface design by R.M. MacKay to explore the Daisy World model. The JAVA interface comes with a link to a 6-page student activity page in PDF format.

Earth System Topics: Atmosphere, Biosphere:Ecology, Biosphere, Climate, Earth's Cycles:Carbon Cycle

Mass Balance Model
Students are introduced to the concept of mass balance, flow rates, and equilibrium using an online interactive water bucket model.

Earth System Topics: Earth's Cycles, Biosphere:Ecology, Atmosphere, Climate

Daisyworld: Stella Mac or PC
After constructing a Stella model of Daisyworld students perform guided experiments to explore the behavior of Daisyworld to changes in model parameters and assumptions.

Earth System Topics: Atmosphere, Climate, Biosphere, Atmosphere:Weather, Earth's Cycles:Carbon Cycle, Biosphere:Ecology

Genetic Drift
In this biology simulation, students use a mathematical simulation of genetic drift to answer questions about the factors that influence this evolutionary process. Students run a series of simulations varying allele frequency and population size and then analyze their data and propose a model to explain their results.

Earth System Topics: Evolution, Biosphere

Human Demographics
In this biology simulation students explore factors that change human population growth including age at which women begin to bear children, fertility rate and death rate.

Earth System Topics: Human Dimensions:Population, Human Dimensions, Biosphere

Fishing Game: Stella PC and Mac
As manager in the fish and wildlife service you are charged with making policy regarding the management of a regional fishery.

Earth System Topics: Human Dimensions:Resources, Biosphere, Human Dimensions:Policy, Human Dimensions

Salmon Smolt: Stella PC and Mac
The Stella Smolts Migration Model focuses on the spring migration of hatchery smolts to the ocean. It may be used to test the relative merits of barging fish or drawing down the reservoirs to help the smolts reach the ocean.

Earth System Topics: Biosphere, Human Dimensions:Resources