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Genetic Drift part of Examples
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.

Subject: Biology:Molecular Biology, Evolution:Processes, Patterns

Human Demographics part of Examples
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.

Subject: Environmental Science:Human Population:Developing/Developed Countries, Biology, Environmental Science:Human Population, Sociology, Environmental Science, Education

Energy Balance Climate Model: Stella Mac and PC part of Examples
Students explore a Global Energy Balance Climate Model Using Stella II. Response of surface temperature to variations in solar input, atmospheric and surface albedo, atmospheric water vapor and carbon dioxide, volcanic eruptions, and mixed layer ocean depth. Climate feedbacks such as water vapor or ice-albedo can be turned on or off.

Subject: Environmental Science:Global Change and Climate:Climate Change:Global change modeling, Environmental Science:Global Change and Climate:Climate Change, Geoscience:Atmospheric Science:Climate Change:Global change modeling, Geoscience:Atmospheric Science:Climatology :Global energy balance

Waves Through Earth: Interactive Online Mac and PC part of Examples
Students vary the seismic P and S wave velocity through each of four concentric regions of Earth and match "data" for travel times vs. angular distance around Earth's surface from the source to detector.

Subject: Geoscience:Geology:Structural Geology:Geophysics and Structural Geology, Physics:Oscillations & Waves:Wave Motion, Geoscience:Geology:Geophysics

Sea Floor Spreading I part of Examples
In this introductory Excel tutorial (Activity I) students use Excel to explore the geodynamics model equation for ocean depth around a sea-floor spreading center. For students with no prior Excel experience.

Subject: Geoscience:Geology, Oceanography

Sea Floor Spreading II part of Examples
Students import ocean bathymetry data from text files, they then use Excel to graph these observations along with model prediction to assess the model's ability to simulated the observed topographic features of the North Atlantic.

Subject: Geoscience:Geology, Oceanography

Trace Gases: Stella II Mac and PC part of Examples
This Stella model allows students to learn about chemical mass balance in the atmosphere and apply this to atmospheric chlorofluorocarbon and carbon dioxide concentrations.

Subject: Geoscience:Atmospheric Science:Climatology :Atmospheric gases, Geoscience:Atmospheric Science:Climate Change:Global change modeling, Geoscience:Atmospheric Science:Meteorology:Atmospheric structure and composition, Environmental Science:Global Change and Climate:Climate Change:Global change modeling, Environmental Science:Global Change and Climate:Climate Change, Ozone depletion

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

Subject: Geoscience:Atmospheric Science:Climatology , Climate Change:Global change modeling, Geoscience:Atmospheric Science:Climate Change, Biology:Ecology:Abiotic Relations, Geoscience:Atmospheric Science:Meteorology:Forecasting, Environmental Science:Global Change and Climate:Climate Change:Global change modeling

Medicine in the Body part of Pedagogy in Action:Library:Teaching with Spreadsheets:Examples
In this activity, we will explore how the dosage and frequency of a medicine taken affect the amount of medicine present in the blood.

Subject: Mathematics

Planck Radiation Laws: Excel; Mac or PC part of Examples
Students use an existing Excel workbook to investigate how spectral irradiance from a blackbody radiator depends on temperature, Excel Mac or PC

Subject: Geoscience:Atmospheric Science:Climatology :Solar radiation, Geoscience:Atmospheric Science:Meteorology:Solar and terrestrial radiation