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Earth and space science
The nature of science
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Educational Level:
High school  
Topics/Subjects:
The nature of science  
Instructional Strategies:
Project-based learning  
Materials Cost:
Free  
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In this introductory textbook chapter, students learn that life on Earth would not be possible without the atmosphere and its greenhouse effect. The history of research on the role of greenhouse gases in the atmosphere is presented, and the concept... (View More)

Learners will identify existing government agencies charged with safeguarding water quality, their geographic jurisdiction, and their subjects of concern, such as water quality laws, information, testing, and enforcement, and identify water quality... (View More)

Audience: Middle school, High school
Materials Cost: Free per student
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