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National Science Education Standards:
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Earth history  
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In this problem set, learners will analyze a table of the length of day (hours) and the number of days per year on Earth in past eras. They will calculate future values, plot some of the data and identify the rate of increase. Answer key is... (View More)

Keywords: Inquiry; Table analysis
Audience: Middle school, High school
Materials Cost: Free

In this activity, students begin learning about archaeoastronomy much as the first skywatchers began learning about the sky: by observing and wondering. Students observe photographs and drawings of petroglyphs, pictographs, and natural and... (View More)

This site contains a variety of educational and supporting materials related to microbiology. Information is provided about microorganisms, extremophiles and extreme habitats, as well as links to online resources that provide information about the... (View More)

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