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Phytoplankton  
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Earth processes  
Life sciences  
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This activity examines the relationship between carbon dioxide levels in the atmosphere and chlorophyll-a measurements in a watershed. Students analyze and compare two Excel plots-one showing carbon dioxide data values from the Keeling Curve and the... (View More)

Audience: High school
Materials Cost: Free

This self-paced, interactive tutorial explores how biological activity helps to determine vertical nutrient distributions in the ocean, examines why upwelling boosts marine productivity, and considers how various physical forces interact to... (View More)

In this activity, students learn about the biological and physical conditions that lead to eutrophication of a water system by using real-time data to predict the the growth of harmful algae. They also conduct research on the Internet to learn more... (View More)

In this activity, learners will use satellite data to investigate the biological health of the ocean. Using a color scale, learners will study ocean color data from NASA's Sea-viewing Wide Field-of-view Sensor (SeaWiFS) to evaluate the biological... (View More)

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