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Earth structure  
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Students will explore Earth's magnetic field using a dipole magnet and compass, and then build a model of Earth's ring current and use it to observe a magnetic field’s response to a fluctuating electric current in this hands-on investigation of... (View More)

Keywords: Magnetism
Audience: High school
Materials Cost: $5 - $10 per group of students

In this activity, student teams will create a controlled experiment by building ecosystems in two 2-liter bottles. Teams determine the control conditions of both bottles, identify a test variable, and run the experiment for several weeks to... (View More)

In this lab activity, student teams hypothesize which source has a greater becomes CO² concentration: their breath, auto exhaust, or air in the classroom. They test gas samples from each of these sources, plot data, and hypothesize about the... (View More)

This experiment has student teams comparing a sample of room air with one of the greenhouse gases - carbon dioxide, nitrous oxide, or methane - and observing the relative effectiveness of the gases in trapping infrared (IR) radiation. The activity... (View More)