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The air is made up of about 21 percent oxygen. This science projects allows you to find this percentage for yourself through examining a chemical reaction between oxygen and rust.It is an educational ...
Determine if the different types of metals on baking sheets can cause cookies to bake differently.It is an educational content by education.com.By clicking on the title of this resource, you will be r ...
Overview of cycles of regulation, de-regulation and government in 20th century US capitalism
It is an educational content by Khan Academy, site that contains a wide variety of educational videos.