Browse K-12 Earth Systems Teaching Activities

Browse the collection of teaching activities and projects that explore Earth's systems, including the lithosphere, biosphere, atmosphere, cryosphere, and hydrosphere. You can refine your search by using the search box or selecting the terms on the right side of the page.



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Mathematics

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A View from the Back of the Envelope

Mitchell N. Charity
This website is devoted to different methods of approximation. The site describes using orders of magnitude, scaling, simplifying numbers, exponential notation, and Fermi questions. Included with the ...