Students will learn how to categorize matter as either pure substances or mixtures. Students will apply tests, based on physical properties of matter samples, to determine whether a mixture is ...
TULSA, Okla. — A new fentanyl mixture discovered by the Tulsa Police Department's forensic lab is raising concerns for local nonprofits that help people with addiction. The Tulsa Police Department ...
THE art of road-making is rapidly becoming transformed into a science, which possesses a “Road-makers' Library“of its own. The bituminous binding materials are now used after study of their chemical ...
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