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Earth and space science
Instructional Strategies
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Educational Level:
Middle school  
Materials Cost:
1 cent - $1  
Learning Time:
10 to 30 minutes  
Topics/Subjects:
Earth structure  
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This is a lesson about the formation of plasma bubbles in Earth's ionosphere. Plasma bubbles cause stars to twinkle and radio signals from satellites to distort. Learners will build a model ionosphere in order to demonstrate and understand this... (View More)

We've all seen pictures of the Earth and its atmosphere as a series of concentric circles, showing the troposphere, stratosphere, ionosphere, etc., often looking like a bullseye target with the solid Earth in the middle. But if we were to draw that... (View More)

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