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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 ...
Soil temperature varies from one month to the next depending upon such factors as solar radiation, rainfall, seasonal swings in overhead air temperature, plant cover, soil type, and depth in the earth ...
This science project compares the amount of ozone in various locations.It is an educational content by education.com.By clicking on the title of this resource, you will be redirected to the content. I ...