Lensyl Urbano

University of Memphis

I've used this often in introductory level earth science classes that discuss climate change, such as "Environmental Geology" and "Weather and Climate"

This is a basic introduction and has no prerequisites.

This is an introductory exercise that prepares students for the reasons for orbital forcing of climate.

Students learn about
* the formation of the solar system from nebula collapse,
* the scientific method,
* understanding of simple equations (Gravity equation),
* the creation and use of simple computer models in science.

The assignment attempts to,
* hone observation skills,
* induce comparison between different types of observations to test hypotheses.

Understanding simple physical equations (gravity equation).

This exercise is designed as a lab, but can also be used as a classroom demonstration. It requires the use of the VPython programs which require Python and VPython to be installed on your computers (this software is free and has been made available on the default image for all computers on our campus). The models show

1. the gravitational collapse of a set of particles to create a central "Sun" with other orbiting particles,
2. a simple model to demonstrate elliptical orbits,
3. a simple model of the solar system showing the planetary orbits (speeded up).

The task is to assess one hypothesis about the formation of the solar system (from a dust and gas nebula) by comparing the computer simulation (model 1) to the shape and form of the actual solar system (model 3). Students can interact with the 3d models by, for example, selecting planetary objects to track, and changing perspectives in 3d space. In doing this students learn about the shapes of the planetary orbits (ellipticity etc) and reasons that they change.

For the lab exercise, students answer short paragraph questions that are based on the learning objectives. In the lecture demonstration, students answer similar questions in class and multiple choice exam questions.

The assignment is included in this document.

The computer models used are hosted on the GeoMod website, and are currently located at:
http://lurbano-5.memphis.edu/GeoMod/index.php/Nebula_Model_Instructions (this link no longer works, but is kept for archival purposes)
link http://lurbano-5.memphis.edu/GeoMod/index.php/Ellipticity_Model_Instructions (this link no longer works, but is kept for archival purposes)

link http://lurbano-5.memphis.edu/GeoMod/index.php/Solar_System_Model_Instructions (this link no longer works, but is kept for archival purposes)

Finally, instructions on the installation of VPython can be found on the website http://www.vpython.org/